The Logitech M320 Wireless Optical Mouse is a simple mouse designed for comfort. Smooth control Thanks to the Logitech's advanced optical sensor, the M320 gives you smooth cursor control & precise tracking. Its wide scroll wheel makes scrolling easier so you can get to work in no time. Wireless capability The Logitech M320 has up to two years of battery life & offers easy wireless computing at home or on the go. The tiny wireless receiver pops into your computer's USB (Universal Serial Bus) port & provides a convenient & reliable wireless connection. Enjoy cable-free computing with the Logitech M320 Wireless Optical Mouse.