1. sd/mmc card input
2. usb input
3. mp3 lcd displayer
4, mode/rec (mp3/bluetooth/fm/rec mode selection)
5, play/scan
6. stop /folder -
7. repeat/folder +
8, previous
9. next
10. mp3 volume
11, wireless mic antenna
12. equalizer
13. wireless mic volume
14. power indicator
15, power switch
16. speaker output (to connect passive speaker box (only 8 q)
17. iec socket
18. fuse:3at/250v
19. 3.5mm input (phone input)
20. aux line volume
21; aux input (mixer or keyboard input)
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22. music treble
23. audio output (line out to mixer or active speaker)
24. music bass
25. wired mic1 input
26. mic treble
27. talk over function(turn on this key, when playing music and using the microphone at the same time, the microphone is preferred)
28. mic bass
29. wired mic2 input
30. mic echo function