Superior battery life gives you more music options. Grind every curb.Bike the Everglades. Chill out in your bedroom. Sony gives you more time with up to 70 hours of battery life The Backlit LCD Display provides easy viewing of song data, so you've got more control of your tunes. And, with 512MB of built-in memory, you can pack your player with up to 345 songs. Features MP3 playback and Skip-Proof Design Features: Ultra Compact Portable Design 512MB Built-In Memory Up to 70 Hours Battery Life with one “AAA” Battery Plays Back MP3/ATRAC3 ®/ATRAC3plus™ Audio Formats Backlit LCD Display Supports WMA and WAV Audio Formats Easy Toggle Navigation Transfer Personal Downloaded Music and CD Recordings Compatible with the Connect™ Music Store Music Management Software Supplied Skip-Proof Design with No Moving Parts Connects to USB Port for High-Speed Data Transfer Multi Language Display Included: Sony Digital Music Player SonicStage® Software Headphones (MDR-E808) USB Cable Shipping Weight: 3 lb