Western Digital WD200EB. Hard drive capacity: 20 GB, Hard drive rotational speed: 5400 RPM, Hard drive interface: Ultra-ATA/100. Input voltage: 5 - 12 V. Weight: 429.6 g, Height: 26.1 mm, Width: 101.6 mm. Operating temperature range (T-T): 5 - 55 °C, Storage temperature range (T-T): -40 - 65 °C, Operating relative humidity range: 5 - 85 %