iTEC MOBILeTouch 241. Device interface: RF Wireless, Movement detection technology: Optical, Movement resolution: 800 DPI. Wireless range: 10 m. Battery technology: Alkaline, Current consumption: 20 mA. Mouse dimensions (WxDxH): 69 x 39 x 105 mm, Mouse weight: 97 g. Compatible operating systems: Windows ME Windows 2000 Windows XP 32bit Windows Vista 32/64bit Windows 7 32/64bit, Minimum system requirements: USB