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Descriptions:
Tips:This is Youtube vedio: youtube.com/watch?v=j6A4oolssTg
Thanks for my kind customer making.
Size: 50 mmx110mm, items color is Green!
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 Included:

1pcs*Green color MCU Adjustable Display Pattern LED VU Meter Level Indicator 16 LED Dual Channel

FeedBack
Guarantee
Return\Refund

FeedBack

We maintain high standards of excellence and strive for 100% customer satisfaction! Feedback is very important. We request that you contact us immediately BEFORE you give us neutral or negative feedback, so that we can perform up your satisfaction.
It is impossible to address issues if we do not know about them!

Guarantee

1. 12 months Manufacturer’s limited Warranty for defective items (excluding items damaged and/or misused after receipt). Accessories come with a 3-month warranty.
2. Defective items MUST BE reported and returned within the warranty period (and in the original packaging, if possible). You must tell us what the defect is and give us your order number. WE DO NOT REPAIR OR REPLACE ITEMS WITH AN
EXPIRED WARRANTY.

Return\Refund

1. You have 7 days to contact us and 30 days to return it from the date received. If the item is in your possession more than 7 days, it will be considered used and WE WILL NOT ISSUEA REFUND OR REPLACEMENT to you. There are NO EXCEPTIONS!
Shipping cost is bear by both seller and buyer in half.
2. All returned items MUST BE in the original packaging and you MUST PROVIDE us with the shipping tracking number, specific reason for the return, and your order ID.
3. We will refund YOUR FULL WINNING BID AMOUNT, upon receipt of the item in its original condition and packaging with all components and accessories included, AFTER BOTH Buyer and Seller cancel the transaction from aliexpress. OR, you may choose to have a replacement.
4. We will bear all the shipping cost if the product(s) is (are) not as advertised.