The Innovera® ultra-compact wireless mouse tracks accurately and is easy to pack away when you're on the go. Ambidextrous design is comfortable for right or left-hand use. The 2.4 GHz plug-and-play dongle conveniently stores in the base of the mouse. Includes two AAA batteries. Connector/Port/Interface: USB 2.0; Left/Right Hand Use: Left/Right; Mouse Technology: Optical; Wired/Wireless: Wireless.