The natural arc design matches the shape of palms, eases your wrists greatly, and makes you feel natural and comfortable Advanced optics positioning pattern, Moving freely on any surface (except glass). Elegant look, unique line, dynamic rhythm, especially for young people. High polymer anti-wear foot pads, 10 times stronger than normal ones. Sensitive buttons, Long durability, over 3 million clicks. High resolution, up to 600-1600 DPI, Sensitive feedback. 10m wireless range.