Case Logic 2.4GHz Wireless USB Optical Mouse (Black) (EW-1000) Adjustable 800-1600DPI high definition optical sensor ensures user works 360 degrees freely. 2.4Ghz USB Micro Receiver Operating range up to 10 meters Uniquely designed with comfort in mind Non-slip, rubber texture for comfort and control Symmetrical design; perfect for left and right hand users No pairing required; Plug & Play via USB nano receiver Auto power function, saves and prolongs battery life; ON/OFF switch