Reliable 2.4 GHz wireless connection-Enjoy carefree wireless. The proven advanced 2.4 GHz standard offers you a range of up to 10 m and 360° coverage. Adjustable 1600 DPI HD sensor -Enjoy total control: with the adjustable DPI sensor, accuracy is no longer left to chance. Adjustable to fit different needs, you can adapt it to match your preference. Vertical ergonomic design -Enjoy superior comfort: whether you already have wrist strain and pain complaints, or you are simply looking to upgrade your working environment with a superior tool, EV250 is a reliable choice. Its fully ergonomic and vertical shape also contributes to better posture while sitting for longer. Up to 9 months battery life Thanks to Rapoo’s energy-saving technologies, combined with the on/off switch, you can use the EV250 ergonomic mouse without replacing batteries for up to 9 months.