This product has been confirmed to be in working order. Only the main unit and outer box are included, as the AC adapter is missing. This is a karaoke processor with a built-in voice canceller that effectively removes vocal parts. It features built-in digital echo and reverb to enhance the vocal parts. Two microphone inputs are equipped with level controls and clip indicators. A 2-band EQ is built-in to accentuate vocal contours. A 6-segment LED output level meter displays the accurate output level. Stereo line input/output allows connection of CD players, MP3 players, etc. The MINI series chassis all use the same dimensions, allowing for stacking. *Depending on the source material, the vocal level may be reduced. Also, the desired effect may not be achieved if the vocal and instrumental parts are concentrated in the same frequency band. 5122002 A4