Sony DNE700 ATRAC/MP3 CD Walkman - 30 CDs onto 1 CD-R Full accessory slim ATRAC CD Walkman New SonicStage Jukebox Software G-Protection continuous jog proof Plays MP3 and normal Cds Maximum battery life up to 86 hours playback with 2 x AA Sony alkaline optional batteries (not supplied) 2 x and more Home HiFi Systems