Verbatim Traveller 750GB. Hard drive capacity: 750 GB, Hard drive rotational speed: 5400 RPM, Hard drive interface: USB 2.0, USB 3.0. Data transfer rate: 5000 Mbit/s, USB data transfer rates: 5000 Mbit/s. Colour of product: Black. Mac operating systems supported: Mac OS X 10.4 Tiger, Mac OS X 10.5 Leopard, Mac OS X 10.6 Snow Leopard, Mac OS X 10.7 Lion. Weight: 160 g, Width: 82 mm, Depth: 125 mm