Volume Control on Microphone Inputs - A separate knob to control volume on EACH microphone. Some machines doesn t offer such facility.
Pitch Control - Used to slow down or fasten the song which gonna change the dancing rhythm.
Disc Trays -
Key Control-

Echo - Add Echo to the voice of the singer
Repeat - Can repeat any word or phrase in the song as much times as you set it up to do
Delay - the time between repeated words using echo function

Cassette Deck -
Graphic Equalizer - Through changing their level you can adjust the song the way you like .
Built In RF Video Output -
Bass
Audio Output Jack(s) - you can enhance the power of the sound by run it out of it into an amplifier