Function explanation accessible by moving mouse on buttons
POWER ON OFF
Turn the unit ON and OFF. For safety, always turn off when stop using. Tray door. 
SOS:
Open tray door, press 222888, then press STOP button, the machine will be reset to factory default in case of any uncorrectable operation. Display window
To show graphical information on the operating status. NUMERIC BUTTONS
Direct numeric access buttons are applicable for tracks up to 2048. EJECT
To open and close the tray door PLAY/PAUSE
To play or pause disc playback. STOP
To stop disc playback. PREVIOUS
To skip to the previous track. NEXT
To skip to the next track.  L/R
To select audio playback modes (mono left, mono right and STEREO) Vocal Cancel
This button combines VOCAL CANCEL (cancel guide vocal of multiplex media) and VOCAL PARTNER (weaken guide vocal of multiplex media when you sing to the microphone) functions. 
O/I: Press VOCAL CANCEL button successively to switch among VOCAL CANCEL RIGHT, VOCAL CANCEL LEFT, VOCAL PARTNER RIGHT, VOCAL PARTNER LEFT and NO VACAL. KEY CONTROL
To adjust total 14 steps key level of music in Karaoke mode. Auto reset after each song finishes.
Note: Only works under Karaoke Mode. Mic 1
1/4¡± microphone jack mic 2
1/4¡± microphone jack Mic 1 VOL
To raise or lower the volume of MIC 1 Mic 2 VOL
To raise or lower the volume of MIC 2 ECHO
To raise or lower the echo level of microphones. Mid level is recommended. HEADPHONE
Headphone Jack for DJ Monitor BBE SOUND
This is a high definition sound processor to enhance the music and vocal and make a dramatic improvement in quality of sound effects. MUSIC VOL
Independent music volume control Speakers
6.5¡± woofer x 2, 1.5¡± tweeter x 2