Case Logic 2.4GHz Wireless USB Optical Mouse (Charcoal) (EW-5004) 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 Perfect for travel 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