Raidsonic IB-231StU3-G. Size: 63.5 mm (2.5 "), Hard drive interface: Serial ATA. Cables included: USB. Compatible operating systems: - USB 2.0: Windows 98, ME, 2000, XP, Vista, 7, Mac OS 9.1+ - USB 3.0: Windows XP, Vista, 7. Colour of product: Grey. Dimensions (WxDxH): 131 x 85 x 16 mm, Weight: 102 g