VocoPro DVX-668K Multi-Format USB/DVD/CD+G Player Multi-format karaoke player with DVD, CD, CDG disc plus MP3 and DivX file compatibility USB playback of digital audio and video files 5.1-channel surround sound via optical or coaxial digital audio outputs.Component video output for HD video 16 step digital key control; 2 microphone inputs with individual volume controls NOTE:Please refer the instructional video and user manual before set up. Multi-format karaoke player with DVD, CD, CDG disc plus MP3 and DivX file compatibility USB playback of digital audio and video files 5.1-channel surround sound via optical or coaxial digital audio outputs Component video output for HD video 16 Step digital key control; 2 microphone inputs with individual volume controls Refer to User Manual (under Product Details) for further assistance; see page 9 for how to set up system with stereo