Akasa Integral S 2.5". Size: 63.5 mm (2.5 "), Hard drive interface: Serial ATA. Interface: USB 3.0. Compatible operating systems: Windows 2000/XP/Vista/7, Mac OS 10.3 +.. Colour of product: Black. Dimensions (WxDxH): 136 x 80 x 16 mm, Width: 136 mm, Depth: 80 mm