Designed for true mobile users, the PX-610U is the only drive in the market that offers a unique built-in battery solution and operates with only a single USB port without the need for an AC adapter or multiple USB ports. Since only a single USB port is needed for power, you can use the extra available USB port for more external devices. Simply connect this drive with the USB port from your notebook or netbook, and you can easily archive data, playback movies or enjoy your favorite music on-the-go.