The Singing Machine sml388w is a CD+G and MP3+G Karaoke System with Synchronizing Disco Lights. It can be connected to a TV to display lyrics on the screen, and it has a LINE IN jack for connecting digital music devices. The system also features a built-in microphone, echo control, and balance control. It is compatible with CDs, CD+Gs, and MP3+G discs, and it comes with a power adapter for use with a standard AC outlet.