Dynamode FireWire-2 & USB2.0 E-SATA Disk Caddie. Hard drive capacity: 400 GB, Hard drive rotational speed: 7200 RPM, Hard drive size: 88.9 mm (3.5 "). Width: 225 mm, Depth: 40 mm, Height: 135 mm. Power requirements: 12V DC, Drive device, transfer rate: 800 MB/s