Pinnacle KeyRig 25. Interface: USB. Weight: 1.36 kg. Minimum processor: Pentium 3 800MHz, Mac G3 800/G4 733MHz, Minimum RAM: 256 MB. Power supply type: USB, 9V DC. Compatible operating systems: Windows XP (SP 2), Mac OS X 10.2.8, 10.3.4, 10.4, 10.5.1., Dimensions (WxDxH): 444 x 216 x 38 mm