S1 in normal display mode,Adjust the intensity of the input signal. the cycle by clicking reduce the number of input signals,According to in the end will automatically return to the beginning. S1 in brightness adjustment mode,press the incredse until the highest level og brightness.
S2 in normal display mode,Used to select the pattern of the display,the same one click conversion cycle,Automatic Return to the last first.S2 in brightness adjustment mode,press the lower level until the lowest brightness.S2 in normal display mode,Long press will enter the brightness adjustment mode,S2 in brightness adjustment mode,Long press will saved and return to normal brightness display mode.
For Wiring Precautions :
1,Can't use the AC power, don't take over the high voltage.
2,The Signal strength is not too high,The signal strength on the headphone jack on the general offer on it,don;t take the power amplifier output signal is too strong,it may demage the circuit.
3,Audio signal 3 lines is label R L G,it is Right channel signals, left channal signals,the signnal ground(that is the negative power supply circuit board)
Package Included:
1pcs*Green color MCU Adjustable Display Pattern LED VU Meter Level Indicator 16 LED Dual Channel