Sony MZ-N1 Net MD Walkman Player/Recorder with USB Record MP3s or CDs at up to 32x speed on affordable MD media for over 5 hours of music per standard 80-minute disc Up to 110 hours of playback using the supplied rechargeable battery and 1 AA battery (not included) Plays ATRAC3 and ATRAC files; converts audio from MP3, WMA, and WAV files Includes USB docking and recharging cradle Music-management software ensures seamless file transfers to and from your hard drive; multi-speed transfers via USB port