Buffalo 300GB MiniStation™ TurboUSB Portable HD. Hard drive capacity: 300 GB, Hard drive rotational speed: 4200 RPM, Hard drive interface: USB 2.0. Power consumption (typical): 2.5 W. Weight: 191 g, Width: 127 mm, Depth: 84 mm. Operating relative humidity range: 5 - 35 %. Data transfer rate (max): 480 Mbit/s