Samsung 20GB Ultra-ATA/66 HDD, N1 Series. Hard drive interface: Ultra-ATA/66, Hard drive capacity: 20 GB, Hard drive size: 4.57 cm (1.8"). Power consumption (typical): 0.65W, Power consumption (standby): 0.3W. Width: 5.4 cm, Height: 5 mm, Depth: 7.1 cm. Power requirements: +3.4V, Disks included quantity: 1 pc(s)