Reliable 2.4 GHz wireless connection Work wirelessly without worries. The proven, mode e 2.4 GHz standard offers you a range of up to ten meters and 360 degree coverage. Adjustable DPI high-definition sensor The sensitivity of the EV250 mouse can be individually adjusted to 4 different DPI levels. The optical HD sensor resolution of the mouse can be switched between 600 DPI (for maximum precision) and 1600 DPI (for maximum speed) at the push of a button. Vertical ergonomic design Enjoy superior comfort: Whether you already have wrist tension and pain complaints, or simply want to upgrade your work environment with a superior tool, the EV250 is a reliable choice. Its completely ergonomic and vertical shape also contributes to a better posture when sitting for long periods of time. Battery life of up to 9 months thanks to Rapoo's energy-saving technologies and the on/off switch