Wireless mouse features an ergonomic design, plug-and-forget nano receiver and intelligent battery management. Advanced 2.4 GHz wireless connectivity delivers fast data transmission and virtually no delays or dropouts. Natural shape and nonslip, rubber side panels provide extra comfort and control even after long hours of use. The ridged wheel provides a better grip for scrolling. An indicator light alerts you when the battery is low, and automatic sleep mode turns off the mouse when you're not using it to conserve your battery. High-definition optical tracking with 1000 dpi delivers responsive and smooth cursor control. Wireless mouse includes a nano receiver, one AA battery and USB compatibility. Mouse is compatible with Windows XP, Windows Vista, Windows 7, Mac OS X 10.4 or later, and Linux kernel 2.6 or later.