MaxInPower BEMIP25B2SS. Size: 63.5 mm (2.5 "), Hard drive interface: Serial ATA. Interface: USB, Cables included: USB. Compatible operating systems: Windows 98 Windows 98SE Windows ME Windows 2000 Windows XP Windows Vista Mac OS, Minimum system requirements: USB 2.0. Colour of product: Stainless steel. Material: Aluminium