Genius XScroll, PS/2. Device interface: PS/2, Movement detection technology: Optical, Movement resolution: 800 DPI. Minimum processor: Pentium, Processor clock speed: 233 MHz. Mouse dimensions (WxDxH): 55 x 110 x 30 mm, Mouse weight: 99.5 g. Compatible operating systems: Microsoft Windows 2003/XP/Me/2000/98, Mac OS, Packaging height: 130 mm, Packaging length: 95 mm