RIO Karma 20GB Digital Audio Jukebox - REFURBISHED 20 GB HDD plays back over 330 hours of MP3 or 660 hours of WMA music 15-hours continuous playback with rechargeable LiIon battery 5-band adjustable equalizer with pre-sets Auto-DJ intelligently finds, mixes and creates playlists from tracks on command Includes Sennheiser earbuds