Seagate FreeAgent Go 640-GB, FreeAgent Go. Hard drive capacity: 640 GB, Hard drive speed: 5400 RPM, Hard drive size: 6.35 cm (2.5"). Colour of product: Black. Weight: 160g. Package dimensions (WxDxH): 177.80 x 50.80 x 146.10 mm, Package weight: 270g. Data transfer rate (max): 480 Mbit/s, Compatible operating systems: Windows Vista Home Basic, Home Premium, Ultimate, Business, XP Home, Professional, Media Center, Dimensions (WxDxH): 130.00 x 12.50 x 80.00 mm