Western Digital My Book Studio 1TB. Hard drive capacity: 1024 GB, Hard drive rotational speed: 7200 RPM, Hard drive interface: USB 2.0, FireWire 800. Colour of product: Silver. Weight: 1180 g, Width: 48 mm, Depth: 135 mm. Operating temperature range (T-T): 5 - 35 °C, Storage temperature range (T-T): -20 - 65 °C. Data transfer rate (max): 800 Mbit/s, Power requirements: 100-240 VAC, 47-63 Hz