A4Tech X-718 Gaming Mouse Pro. Device interface: USB+PS/2, Movement detection technology: Optical, Movement resolution: 2000 DPI. Mouse dimensions (WxDxH): 63 x 117 x 33 mm, Mouse weight: 104.3 g. Compatible operating systems: Windows 98/ ME/ 2000/ XP(X64)/ 2003(X64)/ MCE2005/ Vista X86&X64