A4Tech NB-90 Inductions gamer Mouse Dual Wheel. Device interface: RF Wireless, Movement detection technology: Optical, Movement resolution: 800 DPI. Mouse dimensions (WxDxH): 67 x 127 x 42 mm, Mouse weight: 100 g. Compatible operating systems: Windows 98/ ME/ 2000/ XP(X64)/ 2003(X64)/ MCE2005/ Vista X86&X64