3Dconnexion SpaceExplorer USB. Device interface: USB, Movement detection technology: Optical. Minimum processor: Intel Pentium 4/AMD, Minimum hard disk space: 140 MB. Mouse weight: 0.593 kg. Certification: FCC, CE, VCCI, RRL, WHQL, CTICK, UL. Compatible operating systems: Windows Vista/XP/2000 UNIX Linux, Mouse dimensions (WxDxH): 139 x 194 x 58 mm