Iomega Portable Hard Drive, FireWire 400/USB 2.0, 120GB Silver - 33634 120GB 2.5-inch external hard drive with USB 2.0 and FireWire 400 connections Support for both USB 2.0 (480 Mbps transfer rate) and FireWire 400 (400 Mbps transfer rate) for maximum compatibility Bus-powered design eliminates need for power supply 1-year limited warranty Device measures 2.9 x 0.5 x 5 inches (WxHxD)