Icy Dock USB and Firewire External Enclosure. Size: 88.9 mm (3.5 "), Hard drive interface: Serial ATA. Interface: USB2.0 + Firewire 800. Compatible operating systems: Windows 98/SE/ME/2000/XP; Mac OS 10.2 +. Colour of product: Black, Silver. Dimensions (WxDxH): 147 x 270 x 31 mm