Sony NW-HD3 Network Walkman 20 GB Digital Music Player (Silver) 20 GB Digital Music Player stores 13,000 tracks Plays back in MP3 and ATRAC Audio Formats Up to 30 hours of playback Get 50 songs from Connect.com with product registration Accessories: SonicStage Software, Headphones (MDR-E931LP), Carrying Pouch, USB Cable, AC Power Adapter