Keyboard Builders' Digest / Review
GravaStar Mercury X Pro mouse review
With its sci-fi/alien design, ultra-light magnesium frame, and fancy RGB light, the wireless Gravastar Mercury X Pro mouse is a cutting-edge precision tool for competitive gamers.
Published January 30, 2025

Yes, this is still the same keyboard-themed blog you know as kbd.news! However, GravaStar was kind enough to send me this awesome mouse – the Mercury X Pro 8K – and I instantly fell in love with it. So, I figured it’d be useful to share my impressions.
Introduction
As you can tell from its striking design and impressive feature list, the GravaStar X Pro gaming mouse was built for serious gamers – blending top-tier performance with intricate aesthetics. Yep, it’s a fast, ultra-lightweight wireless gaming mouse. And, as you probably know by now, I’m not a gamer. So once again, you’ll be getting my perspective from the world of coding, blogging, and other far less intense daily tasks – typical of an office worker and hobbyist, rather than a competitive player.
That said, resizing columns in Excel/Sheets or achieving pixel-perfect image cropping for this very blog can be just as intense as landing the perfect headshot in an FPS… so maybe this mouse is overkill – but I’m here for it.
Variants
GravaStar initially made a name for itself with its futuristic audio products, but has since expanded into keyboards and mice, bringing its signature sci-fi aesthetic to gaming peripherals as well. The brand offers a whole bunch of cool mice, sharing the same mouth-watering design language.
The Mercury X Pro 8K is the current flagship model, boasting an 8K polling rate, a 32K DPI sensor, and an ultra-lightweight 49g build! While it features a new sensor and a slightly updated design compared to the Mercury M1 Pro, it looks identical to the more affordable Mercury X (non-Pro) – at least on the surface. In reality, the non-Pro variant is limited to a 1K polling rate.
Color-wise, the X Pro is available in black, silver (Galaxy Black and Interstellar Silver), and the cool, battle-worn yellow – GravaStar's signature colorway.
In the photos below you can see the silver version, matching the GravaStar Mercury K1 Pro keyboard in concrete gray, reviewed earlier.
By the way, the Mercury K1 is still the best pre-built gamer board I've ever tested – amazing feel and sound right out of the box. So, naturally, I was excited to test out the accompanying mouse.
Unboxing & Contents
Now this is what I call quality packaging. I'm talking collector-level stuff here:
In the fancy, shiny silver cardboard box you have the mouse itself, the user manual, 2.1m cable with paracord, an 8K receiver, two sets of anti-slip stickers, replacement feet pads, and a microfiber cleaning cloth.
Quick specs
- Compatibility: Windows 10 and above (more details later)
- 0.8mm magnesium alloy body
- tri-mode connectivity: 2.4G wireless, 5.1 Bluetooth, USB-C wired
- 8K max polling rate
- 32,000 max DPI
- Battery: 400mAh
- Controller chip: NRF52833
- Optical sensor: PAW3950
- Dimensions: 124.6x63.5x40.5mm
- Weight: 49g
Design and Build Quality
The Mercury X Pro is ridiculously lightweight – just 49g! That said, it feels sturdy enough to last for a long time, thanks to the magnesium alloy frame.
We’re all built differently, but its smooth curves, ergonomic design, and relatively low-profile shape fit my hand and fingers almost perfectly. A big part of that is the concave main buttons, which are surprisingly versatile, and the fact that all the buttons are well-placed – at least for my grip style.
And this is important: Your experience, much like with mechanical keyboards, will depend on a variety of factors—some personal preferences, others individual characteristics like hand size, finger length, grip style, working environment, etc.
If we classify grip styles into palm, claw, and fingertip, the Mercury X Pro is well-suited for any of these. However, due to its relatively low profile, most of you will probably use it with a claw or fingertip grip. That said, the airy skeleton frame has some extra benefits for palm grip:
Ventilated, durable, and ergonomic. The innovative hollow skeleton design ensures superior airflow, keeping your palm cool and sweat-free even during intense gameplay. Designed with ergonomics in mind, the shape molds naturally to your hand, providing an optimal grip for hours of smooth, fatigue-free gaming – GravaStar.
Scroll wheel
Silent, no audible clicks, but good tactile feedback anyway.
I'm glad the surface of the scroll wheel is rubber, not magnesium (like the one on the recently reviewed Dareu mouse). Magnesium definitely belongs on the frame, not the wheel surface.
In addition, its pattern provides a good traction.
Performance and Sensor
Equipped with the NRF52833 control chip and and PAW3950 optical sensor, the Mercury X Pro offers exceptional tracking capabilities. Unfortunately, I'm not in a position to judge its gaming performance. In theory, this sensor supports DPI settings up to 32,000 – way too high for me personally – but it ensures responsiveness across various gaming genres. Based on my tests, something between 1600-2400 DPI is ideal for my taste. :)
The 8K polling rate should translate into near-zero latency, allowing for ultra-smooth cursor movement, even during high-intensity gaming. However, aside from competitive gaming, I don't think extreme settings like this have much practical significance.
All in all, whether you're sniping with pixel-perfect precision, making fast, sweeping movements, or browsing kbd.news, the sensor and switches deliver a great experience. The device's capabilities will definitely not limit your gameplay.
Connectivity and Battery Life
The Mercury X Pro is a tri-mode wireless mouse – it offers:
- Wireless 2.4 GHz.
- Bluetooth for versatility across devices.
- USB-C wired mode for uninterrupted usage and charging.
According to the product page, the 400mAh battery should last for several hours—113 hours with Bluetooth, according to the specs.
I haven't charged it yet, still using it as it came (with the receiver) – after some heavy stress test involving plenty of lighting effects.
Some hard numbers? I've been writing this review for about two hours now – typing, photo editing, file management, online research –, and the charging level went from 70 to 68%. So the specs seem to check out.
Anyway, the software should indicate the actual level of charging, so you can keep track of it whenever you want.
Customization and Software
Thank god, there's no need to install any software to access all the settings. Instead, the GravaStar download page directs you to an online configurator (by the way, there's a typo in the printed manual, which is why that link doesn't work).
According to the info on the packaging, the mouse supports "Win 10 and above". That said, it works with older versions like Win 7 too, though you won't be able to connect it to the online configurator (it pairs but doesn't connect). If you're okay with the default settings, it still works just fine.
However, using the software is straightforward and offers plenty of customization options, so it would be a shame not to explore the ways you can personalize your mouse:
Out of all the color effects, I liked the default rainbow one the best, but you can easily customize it via the dedicated page. You can tweak the colors, effects, and even adjust some energy efficiency settings.
Similarly, you can choose any DPI you want, up to 32K. However, you can set the physical button to toggle between 1-6 preset levels. For my everyday use, I played around with a 6-level setup—though, let’s be honest, my resolutions are pretty pathetic compared to the capabilities of the Mercury X Pro. :)
Experiences
It only took a few minutes to find the optimal sensitivity (DPI) for my multi-monitor setup. Initially, I went with the second slowest option on the physical button, but it still felt a bit too fast for tasks like precision cropping of photos for kbd.news. :)
Once you’ve got it set up properly, you don’t really need to worry about the settings anymore.
I haven’t had the heart to stick on stickers or take it apart – disassembly would require tearing off the sliding feet. Let me admire it a little longer, and then I might eviscerate the thing and post some internal shots. ;)
Pros and Cons
Pros
- awesome look
- leightweight
- shape: ideal for various grips
- tri-mode connectivity
- cool lighting
Cons
- the extravagant design may limit its usability in more formal office environments :)
- price?
Conclusion
The Mercury X Pro by GravaStar is my current favorite mouse. It was easy to set up and fine-tune, and it fits my hand and grip style almost perfectly. If you're into this aesthetic, the features won't disappoint. The Mercury X Pro excels as a precision tool for competitive gamers seeking a lightweight, high-quality wireless mouse, but it performs just as well in an office environment – though, let's be honest, it's definitely overkill for the office.
That said, the cutting-edge features come with a relatively hefty price tag. If you're not a gamer and know you won't need 32K DPI and 8K polling, the non-Pro Mercury X offers pretty much the same experience at a somewhat friendlier price and specs for normies. :) Or the similarly fancy Mercury M2, I especially like the transparent one, for almost half the price.
For more information and to purchase the Mercury X Pro or its smaller siblings, visit the GravaStar website:
- Mercury X Pro –
$140$126 – the KBDNEWS coupon code doesn't seem to work at the moment, probably because of the already discounted prices - Mercury X –
$110$99 - Mercury M2 – $68.
Also in the photos:
- Mercury K1 Pro keyboard – concrete gray
- Agile Yosemite deskmat from Kinetic Labs.
Published on Thu 30th Jan 2025. Featured in KBD #185.