Some gaming mice try to disappear under your hand. The Gravastar Mercury M2 does the opposite. It demands attention the moment it hits your desk, with a transparent black chassis that looks more like a piece of Cyberpunk, industrial art than a traditional peripheral. It’s bold, futuristic, and unmistakably Gravastar.
But while the Mercury M2 absolutely nails the brief on aesthetics, living with it day to day reveals a mouse that’s more about visual impact than competitive comfort — especially depending on how you grip your mouse.
Price wise, the Mercury M2 usually lands between $100 and $120 AUD, placing it squarely in the budget wireless gaming mouse segment. It’s roughly half the price of more recent mice I’ve reviewed like the Asus Harpe Ace series, Corsairs Saber, and Razer’s DeathAdders.
On raw specs alone, the M2 can hang with most of them. It offers modern wireless connectivity, a high-end sensor, and respectable battery life. Where it diverges is philosophy. Gravastar isn’t chasing esports minimalism here — it’s chasing visual identity. Whether that trade-off makes sense depends entirely on how you use your mouse.
Design and Build
There’s no getting around it: the Mercury M2 is one of the most visually striking mice on the market. Imagine a hyper sports car but it’s from Cyberpunk 2077. The transparent shell, exposed internal structure, and angular contours give it a cyberpunk aesthetic that looks incredible under RGB lighting. It’s the kind of mouse that elevates the entire desk setup just by being there.
The build itself feels incredibly solid despite the hollowed-out look. There’s no creaking or flex, and at roughly 79 grams, it strikes a good balance between lightweight agility and enough heft to feel planted. The ambidextrous design is visually clean and symmetrical, reinforcing the futuristic vibe.
However, this is where form begins to challenge function. The chassis is covered in multiple contours, cut-outs, and sculpted edges, and while they look fantastic, they don’t always translate into a confident grip. The surface doesn’t give your hand a single, obvious place to settle. Instead, it asks you to adapt to it — and not everyone will want to.
Claw grip users will generally have an easier time. The shape supports a more lifted hand position, and fingers naturally anchor toward the front of the mouse. But for other grip styles, like my hybrid fingertip/ palm style, things get more complicated.
Sensor and Customisation
Technically, the Mercury M2 is well equipped. It uses a PAW3395 optical sensor, capable of extremely high DPI and fast tracking, with performance that feels accurate and consistent in real use. It supports tri-mode connectivity — wired via USB-C, low-latency 2.4GHz wireless, and Bluetooth — which makes it flexible across gaming PCs, laptops, and work setups.
Battery life is solid rather than class-leading, but easily enough for several days of use, even with RGB enabled. Gravastar quotes 50 hours on 2.4Ghz and upto 82 hours with Bluetooth. I have charged it only once in the month I’ve been using it. Charging is straightforward, and wireless stability in 2.4GHz mode is excellent.
Customisation is handled through Gravastar’s software, where you can adjust DPI stages, button assignments, polling rate, and lighting. It’s functional and clear, if not especially flashy. You get what you need without unnecessary clutter, which fits the product’s overall ethos nicely.
Performance
On a purely technical level, the Mercury M2 performs well in games. Tracking is precise, flicks feel controlled, and there’s no noticeable latency in wireless mode. The clicks are responsive and consistent, and the scroll wheel offers decent tactile feedback.
But for me, this is where the mouse ultimately falls down as a serious gaming tool.
As someone who uses a fingertip/palm hybrid grip, I repeatedly found myself confusing the side buttons with parts of the shell itself. The aggressive contours and layered design make it surprisingly hard to immediately distinguish where functional buttons end and decorative structure begins — especially in the heat of a game.
More than once, I hesitated or mis-pressed during CoD: Black Ops 7 sweats because my thumb wasn’t instinctively locked onto the side buttons. That split second of uncertainty is the last thing you want in competitive titles, and over longer sessions it became genuinely frustrating. Instead of disappearing in my hand, the mouse constantly reminded me of its shape.
For casual use, browsing, or creative work, this isn’t a huge problem. But for gaming — particularly fast shooters — it’s enough to be a deal-breaker. Comfort and muscle memory matter more than visual flair when reactions are on the line.
Ironically, that same design that hampers gaming comfort makes the Mercury M2 excellent as a desk show piece. It’s perfectly fine for everyday productivity, light gaming, and general navigation, and it always looks fantastic while doing it.
Verdict
The Gravastar Mercury M2 is a mouse I admire more than I rely on. It’s beautifully built, visually unique, and technically competent, with wireless flexibility and a sensor that easily meets modern expectations. As a design object, it’s outstanding — one of the coolest-looking mice you can put on your desk right now.
But as a gaming mouse, its aggressive contours and unconventional shape make it highly grip-dependent. Claw grippers will likely get along with it far better than palm or hybrid users, and in my case, the confusion between side buttons and shell elements made it something I simply couldn’t trust in-game.
As a result, this wouldn’t be the mouse I’d reach for when gaming seriously. Instead, it’s one I’d happily keep on my desk for its sheer visual appeal — a statement piece that complements a setup rather than defines performance.
Gravastar deserves credit for daring to be different. The Mercury M2 proves that gaming peripherals don’t have to look boring — but it also shows that ergonomics still matter just as much as aesthetics.
Gravastar kindly loaned the Mercury M2 to PowerUp for the purpose of this review
