Top features:- Custom TrueMove3 optical sensor for rapid responses - Ergonomic design for ultimate comfort - Prism RGB multi-colour illumination so you can customise your mouse - On board memory to save your favourite settings Custom TrueMove3The SteelSeries Rival 310 Gaming Mouse has a TrueMove3 sensor. This is ideal for gaming as it has ultra-low-latency and rapid-response giving you natural and accurate mouse movement.Ergonomic designDesigned for maximum comfort the Rival Gaming Mouse is ergonomically designed so you can game for extended periods of time in pure comfort.Prism RGBChoose from the full spectrum of 16.8 million colours to enhance your gaming experience further. Reactive illumination responds to in-game events like low ammo, health, kills and more.On board memorySave all your performances and light settings directly to the mouse. Your key remaps and settings are saved so you can use them every time.