Vosstronics VTG-AX31US. Size: 88.9 mm (3.5 "), Hard drive interface: Serial ATA. Interface: USB 2.0, Cables included: USB x 1. Compatible operating systems: Microsoft Windows, Mac OS. Colour of product: Black. Dimensions (WxDxH): 119 x 195 x 31 mm, Weight: 720 g