B100 Optical USB mouse offers Optical tracking and a comfortable, ambidextrous shape for left-handed and right-handed use. 800 DPI sensitivity delivers precise cursor control so you can edit documents and navigate the web more efficiently. Simply the mouse into your USB port, and it works right out of the box. Darkfield laser tracking allows the mouse to work on a wide range of surfaces Includes clear Glass (minimum 4mm thickness) and lacquered desks. Corded mouse features three buttons and a 5'9" Cable and works with Windows XP, Windows Vista and Windows 7; Mac OS X 10.3.9 or later and Linux Kernel 2.4 Plus. Sensor technology Optical Tracking DPI (Min/Max): 1000± .