Seagate 500GB 2.5" SATA II, Constellation. Hard drive capacity: 500 GB, Hard drive interface: Serial ATA II, Hard drive speed: 7200 RPM. Power consumption (typical): 3.5 W, Power consumption (idle): 2.6 W. Width: 2.76" (70 mm), Height: 0.583" (14.8 mm), Depth: 3.96" (100.5 mm)