HP Wireless 3 Button Mouse in Retail Packaging Smooth, accurate, and affordable wirelessoptical mouse for the desktop; 2 buttons plus clickable scroll wheel Symmetric design has textured sides for enhanced control; rubber scroll wheel is easy to grip Teflon feet for smooth and accurate movement on most surfaces Wireless 27 MHz frequency for clear transmission from USB receiver Compatible with Microsoft Windows XP, Windows Vista, Windows 7; 1-year limited warranty