The Sony Walkman MP3 Player W Series (NWZ-W273) is a one-of-a-kind audio device that couples a MP3 player with wireless earphones. The light-weight, fashionable, and water-resistant Sony Walkman / MP3 Player is ideal to use while working out, going for a run, or on-the-go. With an innovative waterproof design, the W Series can be submerged as deep as 6 feet (2m) underwater. The compact earpiece of this Sony 4 GB digital media player ensures a comfortable fit, and the player also features a drag-and-drop function. Just drag and drop MP3s from iTunes for Windows, Windows Media Player or Internet Explorer and enjoy. Forgot to charge your W Series? Plug it into your computer's USB 2.0 port for three minutes and you'll have up to 60 minutes of use. Enjoy up to 8 hours of uninterrupted play when fully charged.