The HTX Ultra mouse represents a significant update to the HTX shape, incorporating several advanced features while maintaining the design of an open-bottom, solid-top shell. It weighs 32 g, making it 11 g lighter than the HTX 4K.
Technologically, the HTX Ultra utilizes PixArt’s PAW3950 sensor, which supports up to 30,000 CPI. It features Nordic’s nRF54L15 MCU, designed to significantly improve battery life, and includes a secondary USB high-speed MCU to enable polling rates of up to 8000 Hz in both wired and wireless modes.
A key mechanical upgrade is found in the main buttons. These buttons are outfitted with custom-made SPDT (single-pole, double-throw) switches from Huano, rated for 80 million clicks. The use of the SR latch technique minimizes physical click latency; a click can be registered immediately upon the top contact opening rather than waiting for the bottom contact to close. Enabling SR latch mode was tested to reduce physical latency by 1.76 ms in wireless operation.
In terms of response time, the switches show low pre- and post-travel, resulting in a firm and snappy button response, though some lateral movement can be provoked. The side buttons are equipped with Omron D2LS-21 switches, featuring minimal pre- and post-travel and an even actuation point.
Other components include a TTC “Gold” encoder for the scroll wheel, which provides above-average tactility, although scrolling is noted as noisy. The mouse is built with pure PTFE feet, and two sets of fitted PTFE feet are included with the unit.
Performance testing indicates that the HTX Ultra achieves low click latency, recording 0.3 ms at 8000 Hz in wireless operation and 0.1 ms in wired operation when the lowest debounce time setting is used. The device also maintains flawless polling stability across all rates. The
Source: TechPowerUp