Remanufactured Rio Karma 20 GB MP3 Player 20 GB HDD plays back over 330 hours of MP3 or 660 hours of WMA music Compatible with computers with USB 2.0 (1.1 compatible) ports running Windows 98 SE, 2000, ME, or XP Auto-DJ intelligently finds, mixes and creates playlists from tracks on command 5-band parametic equalizer with pre-sets; 15-hours continuous playback with rechargeable LiIon battery Remanufactured to like-new condition; includes 30 day warranty