Corsair M75 Air review: minimal mass, many talents

Introduction

It might sound overindulgent to have multiple computers, but bear with me. I spend most of my day in front of a work PC, then flit between my gaming laptop and Steam Deck for after hours fun; unless I want a desk full of peripherals, that means constantly swapping out mice and keyboard cables or dongles. The Corsair M75 Air has changed all that, without skimping on the performance I want from a gaming mouse.

This super lightweight wireless rodent has a near zero-latency 2.4GHz connection for when I’m gaming, a whip-crack quick 26,000 DPI sensor and optical switches, and a beefy enough battery to last a full weekend of play without needing to plug in once. But what’s really convincing me to swap my usual Logitech G Pro X Superlight 2 for one is the built-in Bluetooth. Here’s why it’s a big deal.

Design & build: on the case

Dressed fully in black and without any of the RGB illumination I half-expect with all gaming gear, the Corsair M75 Air looks rather plan for a $150/£140 mouse. The only splashes of colour come from the fluorescent yellow scroll wheel (which is mostly hidden from view anyway) and the tiny activity LED. At least the solid plastic chassis won’t set off trypophobes, unlike the many ultralight gaming mice with honeycomb cutouts.

Corsair has gone with a symmetrical shape, but only fitted a single set of side buttons on the left. That makes this a mouse best suited to right-handed users. There’s also no dedicated DPI switch; you’ll need to use Corsair’s iCUE software instead, which isn’t great for on-the-fly adjustment. The overall shape suits my palm grip preference, but works equally well for claw-style grips.

At 60g this is a seriously light mouse, and on par with my current Logitech. You’ve got to look towards boutique brands for anything lighter than this. The 100% PTFE skates on the underside glided friction-free across my oversized mouse mat, and was perfectly smooth on my wooden desk too.

I like the handy storage compartment in the base for keeping the 2.4GHz wireless dongle close. It has a USB-A connector, while the mouse itself charges over USB-C. Corsair sticks a quality braided USB-C to USB-A cable in the box, which works perfectly for wired gaming.

Features: Blue fun day

I find a mouse essential for tinkering with the Steam Deck’s Linux desktop – those touchpads are just too fiddly – and my work MacBook has no USB-A ports. Neither are especially elegant once you’ve stuck the dongle in another dongle just to get connected. The Corsair M75 Air is a godsend for my multi-system setup; a press of the button on the bottom of the mouse swaps seamlessly between 2.4GHz and Bluetooth. Multipoint connectivity then makes it a breeze to quickly switch between multiple Bluetooth connections.

Both connection types were nigh on flawless throughout my testing, and I had no qualms playing single player titles on the Steam Deck using Bluetooth. I’m not exactly an elite gamer, but still liked knowing I was getting a much faster 2000Hz polling rate when connected over 2.4GHz. Rivals might go as high as 8000Hz, but someone of my skill level can’t notice the difference.

Corsair’s “Up to 100 hours” battery life claim only applies to Bluetooth, with 2.4GHz being more like 34 – and only when using the stock 1000Hz polling rate. That still proved more than enough for me to get through a week of work and gaming split between both connection types before needing to plug in. The Logitech G Pro X Superlight 2 does go a bit further, though that mouse is 2.4GHz only. The M75 Air takes a little over an hour for a full charge, with the iCue software showing how much juice is remaining.

Performance: iCUE the music

The M75 Air’s left and right mouse buttons use optical switches, which feel snappy and precise with each (very audible) click. The clickwheel and side buttons aren’t quite so advanced, but are still satisfyingly responsive.

Corsair’s Marksman optical sensor had no trouble keeping up with my rapid mouse movements in Doom Eternal, with consistent, accurate tracking through each demon-infested arena. Counter Strike 2 calls for more precision, which is where the M75 Air excelled. It wasn’t enough to transform my K/D average, but headshots seemed to come just that little bit easier than on my old setup. FPS players will feel right at home with one of these in their grasp.

Button customisation, DPI adjustment, surface calibration, and polling rate changes are all handled through Corsair’s iCue software. It’ll also update firmware, tweak sleep mode settings to reduce battery drain, and toggle gamer-specific bits like angle snapping. As basic as the M75 Air appears out of the box, it’s highly tweakable in the areas that matter to gameplay.

Corsair M75 Air verdict

Lightweight mice are rarely overflowing with features, but the addition of Bluetooth makes the otherwise uncomplicated Corsair M75 Air stand out. Simply being able to pair it to my other tech without swapping dongles around first earns it a firm recommendation for anyone with multiple systems.

It’s otherwise a speedy rodent over 2.4GHz wireless, with fantastic tracking and the sort of high DPI twitch gamers crave. The almost-ambidextrous shape will please many, but the side buttons sticking to a single side means this isn’t a top choice for southpaws. And if you don’t have an aversion to lots of tiny holes, the SteelSeries Aerox 3 costs a fair bit less – while also bringing Bluetooth and even longer battery life along for the ride.