Western Digital Caviar Green 500 GB. Hard drive capacity: 500 GB, Hard drive size: 88.9 mm (3.5 "), Hard drive rotational speed: Variable. Power consumption (standby): 0.4 W, Power consumption (off): 0.4 W, Power consumption (read): 3.6 W. Weight: 450 g, Height: 26.1 mm, Width: 101.6 mm. Operating temperature range (T-T): 0 - 60 °C, Storage temperature range (T-T): -40 - 70 °C, Operating shock: 30 G