Vocopro 5 Disc DVD/CDG/VCD/MP3/PHOTO CD Karaoke Changer Multiformat DVD/CD player with 5-disc changer and built-in karaoke system Compatible with CD, DVD, CDG, DivX, VCD, MP3, MP3, CD-R, and CD-RW formats Dual 1/4-inch mic inputs with independent volume, bass, and treble controls for duet performances Digital key control alters the key of background music to match vocal range 5.1 Dolby surround sound output; 1-year warranty