Corsair had been focusing on the MMO/MOBA crowd as of late with the release of Darkstar Wireless and the Scimitar Elite Wireless gaming mouse, but now the company is shifting focus to the ultra-lightweight category with the Corsair M75 Air.

At 60g, the M75 Air is the lightest mouse Corsair has ever created, and takes a no-nonsense approach to its design, skimming as much fat as possible to achieve the light body construction. In fact, Corsair has even trimmed away the DPI button - something I have not seen in any gaming mouse before - in order to keep the mouse to its barest essentials.

After using the M75 Air for over two weeks, it’s hard not to come away impressed. Its fantastic Corsair Marksman sensor, snappy optical switches, reasonably good battery life and flawless wireless performance offers a lot of bang for its asking price of $149.99.

Design and Features

The Corsair M75 Air, unlike its MMO cousins like the Darkstar Wireless and the Scimitar Elite Wireless, isn’t a behemoth. It’s meant to be light and agile, and designed specifically for competitive shooters. In that, Corsair has more than achieved its goal with a lightweight body that feels like it almost doesn’t have anything inside it. In fact, my first impressions when holding the mouse was that it feels oddly cheap - especially for a device that costs $149.99 - and the coarse matte black plastic used doesn’t lend it many favours.

The M75 Air weighs around 60g, which shockingly (considering how the mouse actually feels) isn’t the lightest mouse around. To achieve a lightweight construction, Corsair went to absolute town in trimming down everything and anything that could potentially add weight to the device - that also includes the good ol’ DPI switch. I have never seen a gaming mouse before that didn’t feature a DPI switch - either on the top or at the bottom of the mouse - and I am not sure if such a sacrifice was necessarily required. There are plenty of gaming mice, including my daily driver, the Razer Viper V2 Pro, that weighs similarly (59g) and has a DPI switch at the bottom of the device. It’s an odd choice, in fact a bold one, but that also means that you will not be able to change your sensitivity on-the-fly, and the only way to adjust it is via the Corsair iCUE software.

Corsair also seems to pride itself on creating a fully symmetrical shape for the M75 Air, which seems like an odd feature to point out considering it isn’t an ambidextrous mouse. The company says the shape is designed to provide “maximum comfort and control”, but I don’t consider it any superior to other gaming mice that aren’t fully symmetrical. In fact, I feel like Corsair overlooked the opportunity to make an ambidextrous mouse by adding two side buttons on the right side, which would have truly justified it’s high asking price considering how few options there are for left-handed gamers.

That said, the M75 Air is indeed comfortable. The slightly elongated egg-shape took a day or two to get used to (especially coming from a slightly shorter and rounder Razer Viper V2 Pro), but once my palm was adjusted to the shape, I was popping heads and (politely) calling names in Halo Infinite and Overwatch 2 in no time.

The build quality is pretty solid all things considered. There is no rattle from the inside of the mouse, neither does it creak when squeezed hard. The wobble on the left and right main buttons are minimal at best, too. The side buttons, which sit almost flush with the body, are optimally placed and are easy to press during gaming, while the scroll wheel is covered in a thin piece of rubber coating and has very defined tactility to it.

The back of the mouse features a small button to switch between 2.4Ghz and Bluetooth mode, and two pieces of 100% PTFE mouse feet which helps glide the mouse smoothly on most surfaces. I have tried cloth mousepad, wood, and my jeans, and the mouse had no issues with tracking whatsoever.

Software and Performance

The Corsair M75 Air is a pretty barebones kit, and hence there aren't a lot of options to tinker around with the Corsair iCUE software. It is, however, a necessary install if you are someone that likes to change their DPI settings on a per-game basis. But since there are no DPI or profile buttons on the mouse, you will have to launch the software every time in order to do so.

Under ‘Key Assignments’ (config based on the software) and ‘Hardware Key Assignments’ (config stored on the mouse) sections, you can change the default behaviour of the right mouse click, the middle click, and the two side buttons. The iCUE software is pretty fleshed out so you can configure the buttons to perform a variety of actions, including macros, input text or keystrokes, launch apps, and hey, if you can sacrifice one of the buttons, even switch profiles!

The ‘DPI’ section allows you to change the sensitivity of the mouse. There is only one DPI stage to configure (but of course), as well as a Sniper stage which can be switched to if you bind one of the buttons to the Sniper mode.

The ‘Device Settings’ tab allows you to enable a number of options, including Sleep Mode, Angle Snapping, Lift height, and more. The included USB receiver supports up to 2,000Hz polling rate, which can be enabled by selecting the receiver icon in the software.

In terms of performance, the built-in Corsair Marksman 26K DPI sensor tracks incredibly well. This isn’t my first rodeo with the Marksman sensor, and it has always been accurate and reliable in the other gaming mouse I have tried from Corsair. I phased the mouse in competitive shooters like Halo Infinite and Overwatch 2 and came away with no complaints. The smooth glides of the feet, and the accurate sensor tracked enemies without any delays or lags, so complaints there.

Similarly, the optical switches on the two main buttons delivered instantaneous results, with no noticeable debounce delay or latency. They also produce a sharp and snappy feedback which I have come to appreciate after using softer switches on the DarkStar Wireless and Scimitar Elite Wireless. The side buttons proved to be snappy too and gave a decent kickback during intense firefights in online games.

Battery Life

The battery life on the Corsair M75 Air is reasonably good, but nothing to write home about. Since it doesn’t sport any RGB (except for a small LED on the top to indicate connection status), the battery provides up to 45 hours on the 2.4Ghz wireless connection, and up to 100 hours with Bluetooth. I was able to use the mice for over a week (using it for around 4-5 hours per day) before needing a top-up, so the battery life claims hold up to be true. There is no quick charging functionality, but the battery charges under 75 minutes, according to Corsair.

The Verdict

The lack of a DPI switch and the missed opportunity to make it a true ambidextrous mouse doesn’t deter away from the fact that the Corsair M75 Air is a solid gaming mouse. The Corsair Marksman 26K optical sensor, optical switches, great build quality and the ergonomic shape has a lot to offer for those looking for a no nonsense build. However, it is pricey though, and for the money, one could argue that you are better off with the Razer Viper V2 Pro ($149) or the ASUS ROG Harpe Ace Aim Lab Edition ($119) which offer better looks and slightly more features for the price.