Mionix Naos 3200. Device interface: USB, Movement detection technology: Optical, Movement resolution: 3200 DPI. Cable length: 2 m. Minimum hard disk space: 40 MB. Mouse weight: 0.1522 kg. Compatible operating systems: Microsoft Windows 2000/XP/Vista/7, Mouse dimensions (WxDxH): 130.84 x 84.72 x 38.67 mm