Macally 3.5" USB 2.0 External Enclosure HDD. Hard drive interface: Serial ATA II. Compatible operating systems: -Windows 98SE/WindowsME/Windows 2000/Windows XP. -Mac OS 9.2, Mac OS X 10.1 to 10.4., Minimum system requirements: Desktop/notebook + USB/FireWire.. Colour of product: Silver. Dimensions (WxDxH): 119.38 x 220.98 x 33.02 mm, Width: 119.38 mm, Depth: 220.98 mm. Material: Aluminium