1. Microphone a input 2. Microphone B input
3. Microphone output port (can be used for computer scoring or voice song demand output)
4. Mode 1 direct selection key
5. Mode 2 direct selection key
6. Mode 3 direct selection key
7. Display screen
8. Microphone volume adjustment knob, left knob volume decreases, right knob volume increases
9. Effect volume adjustment knob: the volume of left knob decreases and the volume of right knob increases
10. Music volume adjustment knob, left knob volume decreases, right knob volume increases
11. System parameter setting
12. Preset call
13. Data storage
14. Subwoofer parameter setting
15. Main channel parameter setting
16. S.C post and center parameter settings
17. Echo parameter setting
18. Reverb parameter setting
19. Mic microphone parameter setting
20. Music parameter setting
21. Up / ESC screen up menu setting, press time mark. Up flash, long press exit key, return to the main interface 22. Set the down menu of down display screen, and press the time mark to flash down
23. Control function knob, when setting parameters, left and right rotation can be adjusted
24,PC/USB