Sony NW-E107 Network Walkman 1 GB Digital Music Player (Silver) Small, round multiformat digital audio player weighs under 1 ounce 1 GB built-in flash memory stores up to 680 songs Plays MP3, ATRAC, and ATRAC3 formats; supports WMA, WAV Compatible with content purchased from Sony's Connect online music store Single AAA battery provides up to 70 hours of battery life; connects to Windows PCs via USB 2.0