Buffalo DriveStation Duo™ 2TB. Total storage capacity: 2000 GB, Hard drive capacity: 1000 GB, Hard drive rotational speed: 7200 RPM. Power requirements: AC100-240V; 50/60 Hz, Power consumption (typical): 47 W. Weight: 2.9 kg. Operating relative humidity range: 20 - 80 %, Operating temperature range (T-T): 5 - 35 °C. Compatible operating systems: Windows Me/2000/XP