Approx APPOMM24BK. Device interface: RF Wireless, Movement detection technology: Optical, Purpose: Office. Frequency band: 2.4 GHz, Wireless range: 10 m. Wireless receiver interface: USB. Compatible operating systems: Windows 98SE/ ME/ 2000/ XP/ Vista/ 7; MAC OS 9.1/X, Mouse dimensions (WxDxH): 95 x 65 x 30 mm