Acomdata E5 FireWire 400 External Hard Drive. Hard drive capacity: 250 GB, Hard drive rotational speed: 7200 RPM, Drive device, buffer size: 8 MB. Colour of product: Grey. Power consumption (typical): 40 W. Weight: 1090 g, Width: 117 mm, Depth: 206.5 mm. Operating temperature range (T-T): 5 - 55 °C, Operating relative humidity range: 8 - 90 %