Low-profile keys provide a quiet, comfortable typing experience. Hotkeys enable easy access for Media, My Computer, mute, volume down, volume Up andcalculator; 4 function keys control previous track, Stop, Play/Pause, Next track on your media player. Simple wired USB connection; works with Windows 2000, XP, Vista and 7. Smooth, precise and affordable USB-connected 3-button optical mouse for the desktop PC. High-definition (1000 dpi) optical tracking enables responsive cursor control for precise tracking and easy text selection. 1 year limited warranty.