Transcend 640GB StoreJet 25M2, StoreJet. Hard drive capacity: 640 GB, Hard drive rotational speed: 5400 RPM, Hard drive interface: Serial ATA. Colour of product: Grey. Weight: 0.206 kg, Width: 82.4 mm, Depth: 126.25 mm. Operating temperature range (T-T): 5 - 55 °C. Certification: CE, FCC