PANEL FUNCTION
1- Power: power on/off
2- Led light: led light on/off
3- Mic in: wired microphone input
4- DC9V IN: dc 9v charging input
5- Mic vol: microphone volume adjust
6- Treble: echo adjust
7- Bass: master volume adjust
8- Volume: master volume control
9- Aux input
10- Usb/sd card input
11- Display panel function:
Rec: recording; insert usb/sd card press this button for recording,
press again to stop and play recording sound.
:Play/pause
:Previous
:Next
Mode: mode select