Aluratek AHDUS250F320. Hard drive capacity: 320 GB, Hard drive rotational speed: 5400 RPM, Hard drive size: 63.5 mm (2.5 "). Weight: 180 g, Width: 13 mm, Depth: 127 mm. Operating temperature range (T-T): 0 - 40 °C, Storage temperature range (T-T): -20 - 60 °C, Operating relative humidity range: 10 - 85 %. Cables included: 1 x 6" USB Type A - B (1.8m). Data transfer rate (max): 480 Mbit/s, Material: Metal/Plastic