Sell MCU Adjustable Display Pattern LED VU Meter Level Indicator Amplifier Audio 16 best price

Descriptions: Size: 50 mmx110mm Two fixed hole diameter :3 mm spacing :100 mm Signal input range: minimum 300 mv. Max 5 v (don't take too strong signal) Power supply voltage: DC 8 v to 12 v maximum current: about 70 mA Feature: Two buttons S1 and S2,Long press (more than 1 second)and Short press (less than 1 second greater than 0.2 seconds).Keys function is quite simple. 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 include: 1*MCU Adjustable Display Pattern LED VU Meter Level Indicator Amplifier Audio 16 LED Dual Channel Green lamp light