RadTech BT500 Rechargeable Bluetooth Mini-Size Mouse, 3 Button with Scroll - Silver (13707) Smooth tracking, maintenance-free 1600 dpi non-visible laser technology 10 Meter free space range - control your notebook from across the room. Power switch conserves batteries when not in use or stored Optimum size for fatigue-free ergonomic use and mobile portability Silver finished housing compliments Apple and other computers constructed from Aluminum System Requirements: Mac OS 10.3 or later - Windows 98 SE or later