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Operator
Good day and welcome to the Logitech fourth quarter financial results conference call. (Operator Instructions). This call is being recorded for replay purposes and may not be reproduced in whole or in part without the authorization from Logitech.
I would now like to introduce your host for today's call, Mr. Joe Greenhalgh, Vice President of Investor Relations and Corporate Treasurer at Logitech.
Joe Greenhalgh - VP, IR & Corporate Treasurer
Welcome to the Logitech conference call to discuss the company's financial results for the fourth quarter ended March 31, 2015. The press release, our prepared remarks and slides as well as a live webcast of this call are all available online at Logitech.com. As noted in our press release, we published our prepared remarks on our website in advance of this call. Those remarks are intended to serve in place of extended formal comments today and they will not be read on this call.
During the course of this call we may make forward-looking statements including forward-looking statements with respect to future operating results that are being made under the Safe Harbor of the Securities Litigation Reform Act of 1995. The forward-looking statements involve risks and uncertainties that could cause actual results to differ materially from those anticipated in the statements. Factors that could cause actual results to differ materially include those set forth in Logitech's Annual Report on Form 10-K dated November 30, 2014, and subsequent filings, which are all available online on the SEC EDGAR database, and in the final paragraphs of the press release and prepared remarks from Logitech reporting fourth quarter financial results for fiscal 2015.
The forward-looking statements made during this call represent management's outlook only as of today and the Company undertakes no obligation to update or revise any forward-looking statements as a result of new developments or otherwise.
Please note that today's call will include results reported on both a GAAP and a non-GAAP basis. Non-GAAP reporting is provided to help you better understand our business. However, non-GAAP financial results are not meant to be considered in isolation or as a substitute for or superior to GAAP results. Non-GAAP measures have inherent limitations and should be used only in conjunction with Logitech's consolidated financial statements prepared in accordance with GAAP.
Our press release includes a table detailing the non-GAAP measures together with the corresponding GAAP numbers and a reconciliation to GAAP. This information is also posted on our Investor Relations website. The slides that accompany this call include both GAAP and non-GAAP measures and are also available on our Investor Relations website. We encourage listeners to review these items.
This call is being recorded and will be available for replay on the Logitech website. Joining us today from Zurich are Bracken Darrell, President and Chief Executive Officer and Vincent Pilette, Chief Financial Officer. I'd now like to turn the call over to Bracken.
Bracken Darrell - President and CEO
Thanks, Joe. And thanks all of you for joining us. Fiscal year 2015 was a very strong year. In two years we've tripled our profits, we've delivered the highest earnings per share this year in seven years, and we've transitioned the company into growth mode.
Now let me give a brief overview. And I'll also give you a few telling facts that will show you our business model is working well. As you know, our basic business model is two key things, optimize profit in PC peripherals and build new categories that will become sustainable growth engines. It's that simple.
So how are we doing optimizing profit? Not only did we deliver our three-year goal in year two, but we also over-delivered virtually every line item of our profit improvement goal, gross margin, overheads or OpEx and operating income. In short we crushed the skull.
This year's operating income is not only the best since 2008 but we tripled profit between fiscal year 2013 and fiscal year 2015, and actually delivered the second strongest EPS in the last seven years. All that even though the PC market was down, the iPad market was down even more and the dollar strengthened radically.
As our founder would often say, we didn't miss because of market weakness or currency upheaval; we delivered in spite of it. So I think you'll agree our profit optimization strategy is working well. But as I said at our Analyst Investor Day our transition to becoming a growth company is also working very well.
Looking at our business from a distance one might say how can you claim the growth story is working very well, Bracken, when your reported net sales in FY15 were flat? Well, the answer is that it's clear once you look more deeply into the business that we are growing. But to understand our real existing growth rate you need to dissect our business just a little bit. Vincent and I will do that now. I'll also share some telling growth facts underneath that.
Let me start by saying that we are growing 6% in retail strategic and that's the most relevant growth rate. Why is this 6% retail strategic constant currency growth rate the most relevant? First, I suggest you exclude OEM and Lifesize. Neither is central to our strategy. And more importantly together they operate at breakeven contribution, more on that later. That makes retail strategic 90% of our net sales and 100% of our profit.
You'll also notice I ignored the things we exited in fiscal year 2014 though all the fiscal year 2015 comparisons have them in the base. Strategic retail is just retail for fiscal year 2016. So our real growth rate for the company figuratively speaking is 6% in fiscal year 2015 and our back half and exit rate for Q4 was actually 7%.
And the really cool thing is the way we are growing new businesses. Remember we've grown three new businesses from essentially seeds to real businesses in just the past three years. These businesses, Bluetooth speakers, video collaboration and tablet accessories, are all virtually new in the past three years, and they generated $380m in sales in fiscal year 2015. This year alone our growth categories, those three categories plus reinvigorated gaming, were up by 28% in constant currency. And that growth rate as we exited the year was even stronger at 45%, 45% in Q4.
If you're starting to appreciate the growth story let me tell you more exciting things. Let me show you how much it's changed our profile, just one level below the surface. Here are some telling facts you haven't heard from us before.
Remember when we said a few years ago that we would do fewer, bigger products with great design? UE BOOM was not only our biggest product in fiscal year 2015; it's now our biggest product ever, best this year and best in the almost 34-year history of the Company. Our Bluetooth speaker business more than doubled. And we are off to a strong start with our next music product UE MEGABOOM, which was launched last quarter. It immediately became one of our top five products as well.
And this fewer, bigger strategies is not just working in music, let's look at an example from video collaboration. The Logitech ConferenceCam CC3000e has become bigger than any standalone keyboard. That's right. That one product is larger than any single standalone keyboard we make. Naturally, it too is one of our top selling products for the year and the quarter.
Our overall video collaboration business also more than doubled this year. And we are building on that momentum with the Logitech ConferenceCam Connect, a portable all-in-one videoconference solution we began shipping at the end of Q4.
One more example of a fewer and bigger focus in gaming, we launched the G502 Proteus Core tunable gaming mouse this year, and almost immediately became not only our biggest gaming mouse but helped propel our overall gaming business to 43% growth in Q4 and 28% for the full year. That mouse too is now also one of our top selling products. In fact, five of our top 13 products in the company are now from our growth categories.
I'm really excited about the growth story as products, because we love products. But let's now look at our transformation from another perspective, regional sales. Overall, we have very good momentum. In the Americas region, we delivered a second straight year of high single-digit growth with growth of 9% in constant currency.
In Asia Pacific we delivered two straight years of low single-digit sales growth. But Asia Pacific growth in the back half started to look like [AMR's] growth in the past few years. Q4 in constant currency showed strong acceleration to 11%.
And EMEA, well, even all the noise of a sluggish Europe -- even with all the noise of a sluggish Europe if you double click on our EMEA business you'll find a nice surprise. Our sales performance in EMEA is stronger than it appears. The combination of a strong US dollar and extremely weak Russia and UK markets obscure quite a story. Our constant currency sales in EMEA excluding Russia and Ukraine grew 11% in Q4.
Our growth tells us that customers like what we are doing. We also have another kind of growth occurring, growth in our reputation for design. We have strong momentum with design and innovation experts. We are winning more design awards than in any year ever in the company's history. Just last month we announced that six of our products were awarded with Red Dot 2015 Design Awards. Over the last two years we've received almost 50 prestigious design awards, more product design awards than in any year -- any period in our history, and we expect more to be coming soon.
Now I'll hand it back over to Vincent for more details on our performance.
Vincent Pilette - CFO
Thank you, Bracken. And, good afternoon everyone. I'm also very pleased by our Q4 and full year performance. For the second year in a row we've finished the fiscal year with better than expected results and this time despite the significant headwinds from the stronger US dollar.
Our underlying growth drivers are improving significantly as Bracket highlighted with our retail strategic sales up by 6% in constant currency in fiscal year 2015. We improved our gross margin for the second year in a row and delivered a record gross margin in FY15. We reduced our operating expenses in absolute terms for the second straight year and achieved the lowest level of spend in the last five years. And as a result, we delivered our highest EPS in the last seven years.
And we continue to generate strong cash from operations, achieving a record cash conversion cycle in FY15. Although we have a lot of work in front of us to capture our full market opportunity and navigate through the changes of global currency headwinds, we are very excited by the momentum we have exiting the fiscal year 2015.
As I come back on a few numbers, let's start with our operating profit. For fiscal year 2015 we delivered non-GAAP operating profit of $191m, well above our initial turnaround target highlighted here in Zurich about two years ago. The 9% operating profit margin achieved in FY15 compares to 6.5% profit margin ago and 3.1% two years ago.
The accelerated profit improvement was driven by a higher gross margin and disciplined spending combined with improvements to the fundamental growth drivers, such as innovation, product design and distribution effectiveness.
Our FY15 non-GAAP gross margin improved by 190 basis points to a record 36.8%. While our gross margin did benefit from non-recurring events, our rate improvement mainly reflects the success of our product cost reduction initiatives. We achieved gross margin improvements across all product categories in our profit maximization category by more strategically managing product design and component costs.
In the growth category we improved gross margin as we scaled the business. As an example, gross margin in the mobile speaker category improved by about 400 basis points year over year and has become a good proof point of the advantage of scale in that category.
Going into fiscal year 2016 we face currency headwinds of historical magnitude which significantly impact our gross margin. We have deployed pricing increases across most of our products in key impacted markets. We have developed new cost reduction initiatives, specifically related to the decline in oil price and the dollar appreciation. It will take time to see the impact of those actions, but we are confidently maintaining our long term gross margin target of around 35%.
On the operating expense front we continue to demonstrate disciplined spend management with our non-GAAP operating expenses down for the second consecutive year and falling below $600m for the first time since fiscal year 2010. The spending reductions we delivered go beyond what you can see in our results as we used some of the savings to invest in future growth particularly in support of our growth category.
Our infrastructure spend was down 11% year over year, while our business spend, R&D, marketing and sales was up 2%. Non-GAAP G&A was down to 4.6% of net sales on track to achieve the long term business model of around 4%.
Disciplined spend management, which means not only making every dollar more effective but also generating savings to invest in our growth engine, has become part of our organization's DNA. It will serve us well in fiscal year 2016 as we accelerate the transformation of our internal support functions towards our long-term model. Savings from this accelerated transformation will be used to offset currency headwinds and to invest in R&D and sales to support our growth opportunities.
Moving onto cash flow, Q4 was another very strong cash generation quarter, driven by the improvement we have made managing our working capital. Our cash flow from operations for the quarter was $42m, driven by cash conversion cycle of just 26 days, the second best in our history in a Q4. For FY15 we generated cash flow from operations of $179m with our cash conversion cycle reaching an all-time low of just 23 days.
Moving forward we have slightly adjusted our inventory strategy. We ended Q4 with a high inventory balance compared with the prior year. A portion of this increase was related to the West Coast port strike in the United States, but much of it was driven by our strategic actions. With sales in our mobile speaker category and video collaboration category doubling for the second year in a row, we chose to invest in more inventory for those categories in support of our strong sales momentum.
Additionally, as one example of our cost reduction initiatives, we have implemented a strategy to reduce air freight expenses by building products early enough to allow for shipment via sea. As a result of this operational shift, we expect that our inventory levels during fiscal year 2016 will be somewhat higher than what they were during most of FY15.
Our strong cash position continues to be the foundation of our capital allocation strategy focus on small acquisitions as a priority, annual dividends and opportunistic share buybacks. As we shared last month, we plan to pay out $250m in dividends for FY15 through FY17. Regarding buybacks, we have $248m remaining in our current program, which we began to use last quarter.
Let me wrap up my comments by focusing on currency. The fiscal year 2016 outlook that we shared at last month's Analyst & Investor Day assumed that the euro/USD exchange rate was at $1.12. It has fallen well below that rate so far in FY16, and there is little reason to believe that it will reach or exceed that planning rate in the near future.
As I mentioned, we are taking a variety of actions to offset the impact of the stronger dollar including double-digit price increases for our products in a number of markets. But keep in mind that holding our non-GAAP operating income outlook constant in the face of increasing currency headwinds indicates in fact an effective increase in our outlook and in our underlying efficiency.
In constant currency, our FY16 operating profit outlook would represent approximately a 35% growth if the currency rates stay at the level they are today. The structural changes we are making to the business will position us very well to reach our long-term model faster once the currency volatility has settled.
And on that note I'll turn it back to Bracken.
Bracken Darrell - President and CEO
Thanks, Vincent. I want to close on how we'll continue to build a great design company in the years ahead, an innovation company with strong sustainable growth. Before I do let me add a comment to Vincent's about the strong dollar.
While this creates some short-term pain we are assuming the strong dollar is here to stay and we are playing offence, going on the attack by treating this as an opportunity to accelerate our transformation to strong growth. We are doing things right now that we might have done more gradually had the dollar appreciation never happened.
Let me share some of these key actions with you. First, we are focusing our entire company on our strategic retail business growth. In that regard we are actually increasing our investment in growth categories and future growth categories, so called plants and seeds. We continue to approach future growth categories or seeds with small start-up style teams.
Remember growing from seeds to strong growth businesses is not new to us. As I mentioned earlier, in fiscal year 2015 we generated $380m in sales from mobile speakers, tablet accessories and video collaboration, all businesses that started as seeds within the last few years.
One consequence of our focus on our retail business going forward is that we've begun the process to exit the OEM business. It will be gradual over fiscal year 2016, as we'll honor our commitments to customers that extend over varying periods of time. We are working through the operational details of this transition with our customers, and we'll share more with you over the coming months.
This business gave birth to Logitech, and our final exit from it is now the real symbol of just how far we've come. From two small offices, one in Apples, Switzerland and another on the top of a bicycle shop in University Avenue, Palo Alto, that little company originally served PC makers but we've become an innovation company creating new businesses under our own brands. Logitech has transformed.
Regarding our Lifesize business we continue to see significant momentum in its new cloud-based video communication offering. In the nine months since its launch we have acquired more than 1,100 customers, almost every week hitting new peaks in concurrent cloud calls. And usage as measured by unique monthly callers has been doubling every quarter.
Looking at this fast growth rate we decided to reorganize Lifesize with the goal of deemphasizing Lifesize's legacy offering more quickly to enable maximum traction with Lifesize cloud. Like our move in Logitech to exit the non-strategic parts of our business we've begun to do the same with Lifesize, and we'll then double down on the cloud opportunity to grow faster.
This business is obviously not synergistic with our focus on strategic retail. We are implementing these actions and considering others to optimize the value of this unique asset.
Another key step we are taking is streamlining our overall cost structure through product, overhead and infrastructure cost reductions as strategically targeted restructuring. This realignment is based on an analysis of each of our key business areas rather than an across-the-board headcount reduction.
We will reduce positions in some areas and increase them in others like software with the goal of becoming a faster, more profitable company with capabilities well aligned to our growth businesses. Over the coming year the restructuring cost is expected to be between $15m and $20m with the savings used to continue to fueling new capabilities to expand the growth and offset currency headwinds.
That brings me to our outlook for fiscal year 206. Consistent with last month's Analyst and Investor Day, our outlook for fiscal year 2016 non-GAAP operating income remains $150m. We are planning to deliver that in spite of the uncertainty around the length of the transition period to exit OEM as well as any impact from shifting Lifesize to a stronger focus on cloud-based offerings. We are also confirming our outlook for 7% constant currency growth for our retail strategic sales.
I am very pleased with our results in fiscal year 2015 and with the progress we are making in becoming a growth company. Best EPS in seven years, strongest constant currency retail growth in four years, a growth strategy that's working and delivering big products and we are excited about the surprises in store in fiscal year 2016.
Finally, we are playing offence or in European football terms going on the attack. We are taking the strong dollar appreciation that many of you see as -- many see as some kind of a crisis and turning it into an opportunity to accelerate our transformation to strong growth. We've sharpened our strategic focus through our retail strategic business and are rapidly aligning the company to that. We are generating significant cost savings and using those savings to fund current growth categories as well as seeds to drive future growth.
I'm more excited than ever about Logitech's future. And I'll look forward to sharing updates with you as we move through fiscal year 2016. And with that, Vincent and I are available now to take your questions. Please follow the instructions of the operator.
Operator
(Operator Instructions). Youssef Essaegh, Barclays.
Youssef Essaegh - Analyst
Hello, thank you for giving me the opportunity to speak first here. I wanted to ask you about the OEM business. It still represents about 6% of your sales and now you have decided to run down this business. So I was just wondering if this was taken into account when you first guided us for 2015, sorry 2016 a few weeks ago or that wasn't the case and this is a new decision. And if so, what do you think is going to replace the OEM revenue in your guidance? Thank you.
Bracken Darrell - President and CEO
Yes. That was -- Youssef, thanks for the question. Yes, it was not considered in the guidance we gave before, but we're very comfortable that -- you'll notice we're really guiding on strategic retail. And we're assuming that we're going to exit the OEM business over the rest of the year. The combination of OEM and Lifesize are our assumption here, and we're going to manage it that way, is that we'll break even, essentially, on those businesses, so they won't affect the bottom line.
Youssef Essaegh - Analyst
Okay. So in that case, in the rest of the businesses, where are you seeing the upside? Is it in mobile speakers or what else otherwise?
Vincent Pilette - CFO
Hey, Youssef. Just to be very clear, in the guidance we're guiding on retail strategic, same than a few weeks ago, 7% in constant currency up. We're not guiding on the full-year total company level for revenue because we're still working the plan with our customer with regard to OEM and understand the full impact on the topline.
As Bracken mentioned, we know all the levers in our P&L. Those two business combined run at breakeven. And we confirm the bottom-line guidance of the $150m, despite the currency headwind.
Youssef Essaegh - Analyst
Okay. Sorry, I missed that the revenue guidance is not there anymore. Okay, thank you. I'm so sorry about that. Thank you.
Bracken Darrell - President and CEO
Okay. Thanks, Youssef.
Operator
Andrew Humphrey, Morgan Stanley.
Bracken Darrell - President and CEO
Hi Andrew.
Andrew Humphrey - Analyst
Hi there. Thanks for taking my question. Just on the gross margin mix, if I may, you had a stronger performance in growth categories this quarter, slightly weaker in profit maximization, which is good for topline I think. But on the gross margin side of things, I think typically you've said margin for the profit maximization category is higher. I wonder, can you talk about your full-year gross margin guidance in that context, that just-over-35% figure that you've given at $1.12? How does mix effect that given what you've seen this quarter?
Vincent Pilette - CFO
Yes. So -- Andrew, this is Vincent. So in Q4, Q4 is always a lower gross margin. We have two impacts, a higher E&O write-off as we prepare to exit the OEM business. And that's about counting for about a point. And we have a currency impact now that starts to show up, partially offset still by a hedge, but of 1.6 percentage point. If you add those two, that gives you the operational trend that we've been in Q4 always, lower, but somewhat in line with the rest of the year.
Moving forward, we did consider the currency impact. We have pricing actions. We did consider a cash reduction. And we still maintain an overall gross margin of around 35%.
Andrew Humphrey - Analyst
Great. Thank you very much.
Operator
Joern Iffert, UBS.
Joern Iffert - Analyst
Thanks for taking my questions. The first one would be on the average selling price hikes, and has this already happened with the distributors and retailers or is this still in process? And what is the acceptance level here on the customer side? Do you also observe competitors doing this or are they waiting before (inaudible) is doing this? An update would be appreciated.
Next one please on the restructuring cost of $15m to $20. What is here cash; what is non-cash? And can you give us some more details on the benefits on here, reduced headcount, what roughly could be the percentage, and other structural savings? And if you are stating that you reinvest this in growth, does it mean your growth for the future is becoming more in brackets, capital intensive?
And the last question would be, please, on the momentum starting into Q1 2016, if you are on a similar run rate like you have exited Q4 2015. Thanks very much.
Bracken Darrell - President and CEO
Okay. We'll take each -- I'll take the first and the third one and then I'll hand off the middle one to Vincent. So in terms of pricing, yes, the pricing actions are communicated. They're under way, and virtually everywhere we're going to be raising price around the world, which is most of the markets that are non-US or US-dollar based, the communication's happened. You'll start -- it'll start to show up in -- with customers sometime in the late April through the end of May. I think we'll see it in -- I think we'll start to see the effect of it in Q1.
I can't speak for competitors, obviously, on what they're doing from a pricing standpoint. What I can say is when you look at the computer industry as a whole, the electronics industry as a whole, you're just hearing price increases every day. They're going across. And even when I meet with customers, they almost seem -- as I've noticed, customers, they seem not only not surprised, but waiting for us to raise price. So I'm optimistic that the pricing will go through as planned. It's a little too early to say how -- where we'll end up on that, but we've certainly been aggressive on the pricing side.
On the momentum coming out of the quarter, it's really too early to say. This is the very beginning of our quarter, so it'd be very premature for me to give you any glimpse of that. But I felt very good about the momentum coming out of Q4. We finished the back half of the year, the entire back half of the year with 7% constant currency strategic retail growth. And that's the strongest half-year period we've had yet, and I'm optimistic we're going to deliver the guidance for this year on strategic retail.
Vincent Pilette - CFO
Joern, it is Vincent. On restructuring, most of the restructuring cost will be cash items. In terms of impact, the majority of the impact is for OEM and Lifesize. And then the third dimension, as Bracken mentioned, is a realignment of our infrastructure functions to their [end-stage] business model.
These -- the savings coming from that third action will either be used to offset stronger currency headwinds, if that is the case, or used to invest in new capabilities, like R&D and software or new funding, if you want, the seeds for future new categories. It's not really that it is more capital intensive. It's that we're creating the OpEx room in our P&L to be able to fund the future mid-term and long-term growth.
Going into Q1, Bracken give you the momentum on the topline in term of impact on spend. You should see an OpEx that's slightly flat to declining moving into Q1. And obviously the big unknown -- we're still working through all the details with all of customers -- is the length of the transition of the OEM business as we exit that business. And that is why we chose to focus our guidance on retail strategic, but confirming to investors that we feel very confident in our overall operating profit guidance of $150m for the full year.
Joern Iffert - Analyst
Thanks very much. Just, please, one very quick follow-up. On your guidance on the 7% organic growth in strategic retail, taking into account I read that the price hikes would be 10% to 15%, does it mean that volumes should be flattish for fiscal year 2016 in your guidance? Is this fair to assume?
Vincent Pilette - CFO
That's a very good question. You had a lot of debate. As you know, it's never an easy thing to increase price. We see many dynamics in the market. We will not be alone. And currency is forcing all companies to look at that.
We do not want to plan for 100% success and we do some kind of a trade-off between volume and price or price per unit. Our goal really when we do those price increases is to protect our gross margin or gross profit of the business.
Joern Iffert - Analyst
Thank you very much.
Bracken Darrell - President and CEO
I would add I think we -- as you know, we have very strong market shares in most of our categories, 40%, 50%. And that puts us in a good position as we take these pricing moves.
Joern Iffert - Analyst
All right. Thanks.
Bracken Darrell - President and CEO
Thank you.
Operator
Tavis McCourt, Raymond James.
Tavis McCourt - Analyst
Okay. Thanks. A couple of questions, first, Bracken, on the pricing. I think you raised prices on some of the mature products a couple of years ago or maybe throughout the last couple of years. Aside from that, do you have any history of raising prices by this much, have any at least evidence of what the elasticity of demand may be?
Bracken Darrell - President and CEO
Yes. We have -- we've had -- over the past, we've had periods in specific markets where we've raised price before. And so -- when currency issues have happened in individual markets in Asia, etc., we've raised price. I don't think -- I think it's very safe to say we've never raised prices this dramatically in Europe, and I think that's the big one.
The good news on that is that, and I'm sure you're hearing this elsewhere, because of the incredible depth of the change in the currency and the timeframe, it's really put the whole industry in a position I think where there's a lot of gross margin pain if you don't do something on pricing. So we'll see. We can only speak for ourselves. We're out there, we're raising our prices, and we're confident that we're going to make it work.
Tavis McCourt - Analyst
And then a couple of follow-ups on the non-strategic businesses. So the rationale for the OEM business historically was it gave you a lot of volume I think, covered overhead. What are the impacts of losing the scale from a manufacturing standpoint and its potential impact on the mouse and keyboard retail businesses?
Bracken Darrell - President and CEO
Yes. You can bet that we really did our homework on that, Tavis, because that was one of the big questions. As we really drilled into that, we found we were well above mission -- minimum order quantities and minimum efficient scale in all the components that we use, both in our in-house mice, as well as the ones we were building for OEMs. So we're convinced, with a big margin of error, that this is not -- this is a good move from a profitability standpoint over the medium term. So we're not -- we didn't find any issues there at all.
Tavis McCourt - Analyst
Okay. And two follow-ups for Vincent. Vincent, the 7% constant currency gross guidance for retail in fiscal 2016, what would that be on a reported basis? I know OEM and Lifesize are going to be a bit of moving target this year, but at least on a retail basis, given where the currency is now, (multiple speakers).
Vincent Pilette - CFO
So your guess in term of what the rate will be through FY2016 is as good as mine, but if you use today's rate of the euro/USD at $1.06, we would lose about 6 percentage point on a reported basis. So at 7%, constant currency gross rate would be equivalent on a 1% USD year over year using $1.06 in FY2016.
Tavis McCourt - Analyst
Great. And on Lifesize as you focus on the cloud business, some of those legacy products generated nice gross margin. Is that a business that'll go into a loss-making category for a few quarters as you make this transition or will you cut costs and --?
Vincent Pilette - CFO
So we're still working the transition point. I think in term of the cloud that we've focused, we've had a very successful launch in the first 10 months. Obviously, as you know, with cloud, you build infrastructure and then you need scale to be able to be more profitable. But we don't see a big disconnect between the gross margin we had on the infrastructure business. And the cloud gross margin is slightly under today, but moving towards that 65% that we've had. So from that perspective, we're not too worried.
The real thing for us is, for both OEM and Lifesize, is managing the transition. For OEM, it's exiting the business. And for Lifesize, it's really doubling down on that cloud, which will shrink the overall revenue, but accelerate the growth and the penetration in our customer space.
Tavis McCourt - Analyst
Okay. Thanks, Vincent. Thanks, Bracken.
Bracken Darrell - President and CEO
Thanks, Tavis.
Operator
Michael Foeth, Bank Vontobel.
Michael Foeth - Analyst
Yes. Hello, guys. One question on the OEM business exit again. Can you remind us how integrated the manufacturing of retail and OEM mice is? And would you eventually consider fully outsourcing or externalizing the production of both retail and OEM?
Bracken Darrell - President and CEO
Yes. The answer to your question is they're not very integrated, surprisingly not integrated. It might surprise some of you that most of our OEM mice were not made in our factory, which makes us even more logical. In fact our factory now makes -- this may also surprise you. Our factory also makes a lot of our growth products, where we have IP and knowhow that we really don't want to share broadly with other people, at least as we launch these categories.
Michael Foeth - Analyst
So you will simply stop producing OEM mice in your (multiple speakers)?
Bracken Darrell - President and CEO
Yes. We're going to stop selling OEM mice, and most of those we didn't produce.
Michael Foeth - Analyst
Okay. Right. So is there -- is it in fact just a phase-out or can you sell this business or the IP?
Bracken Darrell - President and CEO
That's a good question. We got that in the press conference we had today. Yes. I think it's a declining business. It's operating -- it's a very low-margin business. It's hard to imagine that we're going to sell that for a lot, so I wouldn't assume much if you think that there's a possibility of selling it.
Vincent Pilette - CFO
Our number-one objective is really working with the customer and making sure we can live with our commitment and work a transition plan that would work first and foremost for our customers.
Michael Foeth - Analyst
Okay. Thank you.
Bracken Darrell - President and CEO
Thank you.
Operator
(Operator Instructions). Paul Coster, JPMorgan.
Paul Coster - Analyst
Thanks for taking my questions. So regarding the OEM exit, which seems to make sense, I just want to check though that you're not losing some kind of intimacy regarding OEM intentions or (inaudible).
Bracken Darrell - President and CEO
Yes. We are -- this is -- and, Paul, you're exactly right. This is one the arguments we made for staying in it to ourselves. I think as we got further into that we realized a lot of the benefit, and maybe there was in the beginning or even the last decade, has dissipated. The kind of relationship we've ended up with, with the OEMs we supply is great, but we think most of that relationship, we'll be able to sustain what we need going forward as a big -- the biggest mouse player in the industry. So we don't think we're losing anything there.
Paul Coster - Analyst
Okay. And then on the growth category side, I think we've all seen categories that experienced hyper-growth for two, three years and then slowed down pretty dramatically. It sounds like you've got really good momentum on the mobile speaker side, at minimum, and also on the video, on the conferencing side. Can you talk to us a little bit about whether -- how long you see this hyper-growth phase lasting for, for those categories?
Bracken Darrell - President and CEO
They're both -- I think they're still both at very early stages. I'm sure you won't see the kind of growth we did see at the very beginning, but I think you're going to see very strong growth over the next several years in both categories.
Video collaboration, for example, there's -- some people would estimate there are 20m rooms that ought to be video-enabled right now. About 1m of them are, 1m, so there's a lot of room left. We're always saying for the cost of one room -- one chair in a conference room, you can video-enable the room now.
On the Bluetooth speaker side, the growth has just been extraordinary. And I think -- we don't see a real -- something that's going to really stop that. Undoubtedly, it will start to crest a little bit, but I think it's going to still grow for some time. And I would ask PC -- add that PC gaming is on a good structural growth curve, and the consumer dynamics there don't suggest there's any end in sight there either.
So those are three of the four growth businesses we have where I feel really good about the fundamental category growth. And we're building more. So the new seat stuff is not in any of those categories, and they're all in either non-existent categories or very small ones that we think can have exponential growth.
Paul Coster - Analyst
Thank you.
Bracken Darrell - President and CEO
I would add one other thing on music, which I think is really interesting, Bluetooth speakers. If you look at the penetration of the Bluetooth speaker category relative to mobile phones, it is -- it's almost as small as that video collaboration penetration of the rooms that ought to have video. So it's very, very small, in the single -- 2%, 3%, 4%, 5%. There's a lot of room left.
Paul Coster - Analyst
Thank you.
Bracken Darrell - President and CEO
Thank you, Paul.
Operator
Andreas Mueller, Zurcher.
Andreas Mueller - Analyst
Yes. Thanks for taking my question. I have a question on the inventory days. How many days would you say of these 17 days longer inventory days are the structural, basically, changing from airfreight to shipping and also holding more inventories on these growth categories?
Vincent Pilette - CFO
Yes. So on the year-over-year basis, when you look at March 31 inventory, inventory days, you're right, we're up 17 days. If you look at a dollar basis, we're up $50m. I would say about half of that growth would be that structural growth that we will keep into the inventory. The rest is coming from the port strike in the US, as I mentioned. So about half of it, Andreas.
Andreas Mueller - Analyst
Okay. Thanks.
Operator
(Operator Instructions). Felix Remmers, Credit Suisse.
Felix Remmers - Analyst
Yes. Hi everyone. Yes. Hi. You hear me?
Vincent Pilette - CFO
Yes.
Bracken Darrell - President and CEO
Yes, sir.
Felix Remmers - Analyst
Perfect. Okay. Thanks for taking my question. On OEM, one last point. Not clear to me is the timeline, so how we should model the transition or the phase-out here? So can we assume, for fiscal year 2017 already, zero sales in that category?
And on Lifesize, what are the incremental steps you're taking? Because the transition to the cloud is actually nothing new. We have talked about it a couple of quarters now. So I was wondering, what are the incremental steps you're taking? And I was wondering how much sales you're generating already in the cloud here.
And then lastly, the PC gaming appears to do underlying very well, so can you share some color here on the trajectory at the moment? So last quarter you grew 24%, if you adjust for everything, so is that number actually growing quarter over quarter?
Bracken Darrell - President and CEO
Okay. Let me -- I'll take a couple of these, just to divide it up. I'll let Vincent take one too. So the -- on the OEM timeframe, it's really hard for us to say right now. We're planning -- as Vincent said, our priority really is to make sure that the customers that we serve for many years have a good transition into other places.
So we're going to manage that. I don't know how long that will take. It -- I certainly don't expect it to happen past fiscal year 2016. So -- but I -- but we'll see at what quarter we're actually fully out. So we'll just have to see.
I'll let you take the second.
Vincent Pilette - CFO
If I can just add on that OEM, Felix, we now have built a reputation of delivering on what we say. And rather than throwing some numbers, will it take three months or six months? We just don't know, and we're asking if it's possible to really your model around retail strategic for the sales, which will grow in 7% constant currency, and understand that we will manage the decline of that business to keep it breakeven on the OEM side and deliver the $150m for the full year. After that, if you need to plug a number, your guess is as good as mine.
As soon as we have more information and an operational plan worked out with our customers, then we will inform you of what it means for the full year. That's on OEM.
Bracken Darrell - President and CEO
Let me take the PC gaming one and then I'm going to hand the Lifesize back to Vincent. So about PC gaming, you asked do we see momentum. Is the momentum headed in our direction on PC gaming? I think the answer is yes. We're starting -- we're really -- we've really had a very strong quarter and really strong year on improving our mouse lineup. And we've really got a strong lineup right now. We've grown a lot of market share and we see a lot more room there.
In keyboards, we've launched some great keyboards. We've been constrained on demand, so you're going to see us unlock that demand -- or supply, unlock that supply, especially as we exit Q2 and into Q3, when the peak season hits. And then there's headsets, which have been very, very strong.
So yes, I think the momentum's going to get better and better. We'll see.
Vincent Pilette - CFO
So, on Lifesize, Felix, this is -- so we launched the cloud about 10 months ago. We told you that was the strategy for the asset to make it more valuable, shifting from the old to the new. But we're managing a slow transition. We've seen two things. One is a very fast adoption of our cloud. Yes, still small in terms of base, but by any SaaS business model, if you want, we have a very fast start.
At the same time, we've seen a faster decline of the infrastructure revenue. And rather than trying to balance all of it, we thought we would take the opportunity now to refocus also all the sales organizations to be cloud-based focused. And then we'll still take orders for the old revenue, but we're not going to sell it, anymore, actively. And I think that's the next step, if you want, in the acceleration of the transformation.
Bracken Darrell - President and CEO
Yes. Not to insult your knowhow here, but in case you're not as familiar with what -- when we say SaaS, software as a service. That's what we're referring to.
Felix Remmers - Analyst
Sure. Okay. Thank you very much.
Bracken Darrell - President and CEO
Thank you.
Operator
There are no further questions at this time. I would like to turn the conference back over to Mr. Darrell for closing remarks.
Bracken Darrell - President and CEO
Okay. Thank you very much. I just -- I'll just close with three or four things. First, we're really proud and excited about the year we just closed. This retail strategic, which is obviously what we're focused on in constant currency, 6% for the full year, 7% in the back half of the year, and then guiding to 7% going into next year, I think we're just in the right place on this.
The second one is we're very proud of the earnings performance. It took a lot of work to get there. And I think we've really got all the engines firing underneath, the plumbing that's working, to make sure that we have our earnings just continue to improve over time.
The third one is, you know and you've heard it and we've written it, we're really organizing this business, including the exit of OEM, to focus and double down on retail strategic. That's what Logitech's going to be going forward. And I think you'll be excited about some of the surprises we have in store in that area in the next year.
So with that, I'm going to close. Thank you all very, very much for attending. And we're going to go out in the sun here in Zurich.
Operator
That concludes our conference call for today. You may now disconnect. Thank you.