EWEADN S9 Ultra is supposed to be a cheap alternative to the Razer Viper V3 Pro thanks to its very similar shape and great sensor. The model actually comes in a few versions, S9, S9 Pro and S9 Ultra and also in different colors: white, black, green, violet and red. I tested the red S9 Ultra model, which includes tri-mode connectivity and dual sensors, and supports up to 8000Hz polling in wired mode.
Shape, Weight & Build
The shape is clearly inspired by the Viper line: low front height, tapered sides, slightly flared rear, and a symmetrical shell. It’s a safe design for claw and fingertip grips, but it also works for smaller palm grips. The shell feels solid with no flexing or rattling, and the finish on this red version is a matte plastic that doesn’t attract fingerprints.
The weight is around 63g without the dongle, which is very competitive for a wireless mouse with tri-mode support. The weight distribution is balanced and doesn’t feel back-heavy, even with the internal battery. Skates are standard PTFE but slightly rough out of the box, I’d recommend replacing them if you’re picky about glide feel.
Buttons & Scroll Wheel
The primary clicks use Kailh White Sword switches rated for 100 million presses. They feel crisp with low pre-travel and moderate actuation force. The clicks are louder than average, which might be noticeable in quiet environments. Side buttons are snappy and placed well for quick access. The scroll wheel is tactile with distinct steps, suitable for gaming and regular use. The middle click has some resistance but nothing unusual.
Sensor & Performance
The S9 Ultra uses a PixArt PAW3950 main sensor paired with a PixArt AR2862 lift-off sensor. Tracking is accurate with no spin-outs or smoothing during fast swipes. DPI steps are adjustable in 50 DPI increments, and the default steps can be edited via software.
Wired mode supports 8000Hz polling. I tested it using MouseTester, and the report rate was consistent. In practice, though, I didn’t notice a meaningful improvement in aim or latency compared to 1000Hz during actual gameplay. Unless you’re running a 240Hz+ monitor and playing competitively, the difference is likely negligible.
Wireless mode (2.4GHz) defaults to 1000Hz. Latency here is low and stable, good enough for any fast-paced game. Bluetooth is also included but should be used only for casual work or device switching, it introduces a visible delay.
Battery Life
Battery capacity is listed at 500mAh. During mixed use (office work during the day, gaming in the evening), I got just under four full days before recharging. There’s no battery indicator in the software, only a blinking LED when the charge is low. Charging is done via USB-C, and the cable is flexible enough for play-and-charge.
Software
The companion software allows basic customization, DPI, lift-off distance, polling rate, debounce time, macros, and button remapping. It’s not especially polished but works. Profiles have to be changed manually, and there’s no onboard memory for more complex configurations.
Final Verdict
The EWEADN S9 Ultra offers strong value for money. It delivers on its core promise, a lightweight, high-performance mouse with top-tier specs at a lower price point than big-name brands. It’s not as refined as a Razer or Logitech mouse: the stock skates, software, and finish all leave room for improvement. But in terms of tracking, click feel, shape, and wireless stability, it holds up well.
If you’re looking for an ultralight mouse with good internals and are willing to accept a few compromises in finish and software polish, the S9 Ultra is worth considering.
Pros:
– Low weight (63g)
– 8000Hz wired polling
– Accurate sensor with dual-sensor system
– Solid buttons with Kailh White Sword switches
– Competitive price
Cons:
– Rough stock skates
– Basic software
EWEADN S9 Ultra Specs
| Feature | Specification |
|---|---|
| Sensor | PAW3950 UltraFlagship + PAR2826 |
| Polling Rate | Wired & Wireless Dual 8000Hz |
| Switches | Kailh White Sword Flagship (100M Clicks) |
| DPI | Up to 42,000 |
| Connectivity | 2.4G Wireless, Bluetooth 5.0, Wired |
| Battery | 500mAh |
| Weight | 65g (reported) |
| Buttons | Left, Right, Scroll Click, 2 Side |
| Customization | DPI, Button Assignments, Macros |
| Software | Available for advanced settings |
| Lift-off Distance | Down to 0.7mm (Ultra) |
I love testing and writing about new tech. I focus on keyboards and controllers. I'm also a gamer and an engineer. Check out my Twitter for keyboard and controller news and reviews.
