Western Digital My Book Studio Edition II 1TB. Hard drive capacity: 1000 GB, Hard drive rotational speed: 7200 RPM, Hard drive interface: USB 2.0. Colour of product: Grey. Weight: 2630 g, Width: 98 mm, Depth: 154 mm. Operating temperature range (T-T): 5 - 35 °C, Storage temperature range (T-T): 20 - 65 °C. Data transfer rate (max): 480 Mbit/s, Minimum system requirements: USB/FireWire/eSATA, Power requirements: 100 - 240 V AC @ 47 - 63 Hz