Seagate 160GB External Hard Drive ST1600826AR PC and Macintosh Connectivity with USB-2 High Speed (Backward Compatible with USB 1.1) Hot Swap Capable Unit Size - Vertical with Pedestal 7.125 D x 2.5 W x 7 H / Horizontal 7.125 D x 6.5 W x 2.25 H Works with Windows PC and Macintosh / Desktop and Portable Dual-Volt AC Power Supply