Mouse Wire Optical Number of Buttons 2 Black Cable Length 6 ft Connector Type USB Compatible With Linux Kernel 2.6 Mac(R) OS X 10.4 Mac(R) OS X 10.5 PC/MAC(R) Windows 2000 Windows 7 Windows 8 Windows 98SE Windows ME DVRs Windows Vista(TM) Windows(R) 98SE Windows(R) XP Number of Batteries 0 Height 1 in Length 4 1/4 in Width 2 1/4 in Features Capacitive Sensor to Replace Traditional Middle Wheel Sanitizable Medical Mouse Wrapped With Durable Silicon Rubber