Hitachi Touro Mobile Pro 500 GB. Hard drive capacity: 500 GB, Hard drive rotational speed: 7200 RPM, Hard drive interface: USB 3.0, USB 2.0. USB data transfer rates: 12, 480, 5000 Mbit/s. Colour of product: Black. Windows operating systems supported: Windows XP, Windows Vista, Windows 7, Mac operating systems supported: Mac OS X 10.5 Leopard, Mac OS X 10.6 Snow Leopard, Mac OS X 10.7 Lion. Weight: 155 g, Width: 80 mm, Depth: 15 mm