Etekcity 1600 DPI Scroll Black/Grey Ergonomic Wireless USB Optical Mouse for Computer Laptop Notebook with 30ft Range, Mini 2.4GHz Nano Receiver, High-Resolution Sensor, 3 Adjustable DPI Levels, 6 Buttons (2 AAA Batteries Included) High-precision (1600 DPI) with 3 adjustable levels (1000/1200/1600) to suit ordinary, casual gaming and high-volume data manipulation needs High-resolution X5 optical engine sensor with mini 2.4GHz nano receiver for up to 30ft range provides consistent, accurate performance Ergonomic right-handed design with thumb control for back/forward navigation, up to 5 million clicks over a life time Highly accurate DSP; Auto-shutoff feature conserves power and extends battery life Compatible with Windows, Mac, and Linux