Razer DIAMONDBACK 3G 1800 dpi, Frost Blue. Device interface: USB, Movement detection technology: Optical, Movement resolution: 1800 DPI. Mouse dimensions (WxDxH): 129 x 63 x 38.5 mm. Compatible operating systems: Windows 2000 / XP / X64 / MCE 2005 / Vista / Vista64, Minimum system requirements: • PC with built-in USB ports • CD-ROM drive (for drivers)