Icy Dock MB663USR-1SB. Size: 63.5 mm (2.5 "), Hard drive interface: Serial ATA, USB 2.0. Interface: USB. Compatible operating systems: Windows 98 Windows SE Windows ME Windows 2000 Windows XP Windows Vista Windows 7 Mac OS v9.0+. Colour of product: Black. Dimensions (WxDxH): 94.7 x 170.9 x 25.4 mm