XBAB Tech Presents

XA25

The lightest full-size gaming mouse ever made.
25 grams.
Latency at the theoretical limit.

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Product rendering /
3D model viewer
— XA25 —

25 g Weight
117 mm Length
<1 μs Latency overhead
8000 Hz Polling Rate
PixArt PAW3950 Sensor

Shell detail /
orthogrid structure
macro photograph

Light without compromise.
No holes required.

Traditional lightweight mice achieve low weight through honeycomb cutouts — compromising rigidity and feel. The XA25 uses MJF additive manufacturing to print a dense internal orthogrid structure that cannot be replicated by injection molding. The result: full solid surfaces, a slightly textured matte black finish, and a weight no injection-molded mouse can match.

Performance

Every microsecond matters.

Lowest Latency on the Market

Custom in-house firmware achieves less than 1 μs overhead above the theoretical minimum for the given hardware at 8000 Hz polling. No off-the-shelf firmware comes close.

PAW3950 Sensor

PixArt's flagship sensor, paired with a 192 MHz Cortex-M4 MCU and firmware tuned to extract its full capability. Sensor latency is minimized at the firmware level.

Ultra-Flex Cable

1.9 mm diameter, smooth non-braided outer jacket. Fully shielded and compliant with USB 2.0 signal integrity (eye diagram) tests at 480 Mbps. Flexible enough to be nearly unnoticeable in use.

Premium Components

Kailh Sword GM X switches rated 100 million clicks for left and right buttons. TTC Gold Dustproof scroll wheel encoder.

No-Install Configuration

A minimal WebHID-based control panel runs directly in your browser. No drivers, no software installation. Configure polling rate, lift-off distance, and more without bloat.

Assembled in the US

PCB and cable sub-assemblies are manufactured in China. Final assembly and quality control are performed in the United States by our own hands — every unit inspected and tested before it ships.

Designed from scratch.
Built in-house.

qsxcv has spent over a decade modding, reverse-engineering, and writing custom firmware for gaming mice. All technical engineering on the XA25 is done entirely in-house: firmware, PCB design, and shell design.

We don't outsource our core work or rebrand someone else's mouse. Every microsecond of latency we've shaved, every gram we've removed, every decision in the XA25 is ours.

Read the process →
  • Weight25 g
  • Dimensions117 × 62 × 37 mm
  • ShellMJF additive manufacturing, ambidextrous
  • SensorPixArt PAW3950
  • Polling rate8000 Hz
  • SwitchesKailh Sword GM X (100M), L + R
  • EncoderTTC Gold Dustproof
  • MCUNuvoton M483 — 192 MHz Cortex-M4
  • Cable1.9 mm diameter, USB 2.0 480 Mbps compliant
  • ConnectivityWired USB
  • ConfigWebHID (browser, no install)

Blog

From our build log.

01 Who We Are and What We're Building An introduction to XBAB Tech and the XA25 project. 02 Shaving the Last Microsecond Firmware architecture and the pursuit of minimum possible latency. 03 Cable: Maximum Flex, Full USB Compliance Why most ultralight cables fail signal integrity — and how we fixed it. 04 Shell: Lightest Without Holes MJF additive manufacturing and the orthogrid structure that makes 25g possible.
All posts →

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