A superb general purpose 3-D optical mouse. Having an optical sensor means that no regular cleaning is required as has to be done with ordinary mice. Suitable for Win 98/2000/XP/Vista. . . 3 buttons . Non-slip scroll wheel . Ergonomic design . 1.5M connecting cable . PS2 and USB interface . 800 DPI . . The mouse comes with a USB to PS2 adaptor, and is attractively finished in silver and black.