The Innovera Mid-Sized wireless optical mouse is comfortable for use with either hand and accurately tracks on virtually any surface. The ergonomic design and rubber surfaces ensure all day comfort and productivity. The 2.4 GHz plug-n-play wireless dongle conveniently stores in the base of the mouse. Includes two AAA batteries. Connector/Port/Interface: Dongle; Left/Right Hand Use: Right; Mouse Technology: Optical; Wired/Wireless: Wireless.