RCA LYRA 256MB Expandable MP3 Player RD1075 256MB built in flash memory stores up to 8 hours of music or any computer file type. External memory card slot supports SD and MultiMediaCard (not included). PC/Mac compatible, Plays mp3, mp3PRO and Windows Media Audio. Multi functional LCD display with ID3 tags support displays title, artist and bit rate, USB connection for faster transfers. Music management software CD ROM includes MusicMatch Jukebox, Battery operated (uses 1 AAA alkaline battery).