Apple Pegasus R4, Promise. Total storage capacity: 4000 GB, Hard drive capacity: 1000 GB, Hard drive rotational speed: 7200 RPM. Cables included: AC. Power requirements: 100 - 230V, 50 - 60Hz, Power consumption (typical): 78 W, Power consumption (sleep mode): 55 W. Weight: 6900 g. Compatible operating systems: Mac OS X 10.6.8 +