This is a dual meter driver board, which must be driven by the pre-stage audio signal. It adopts professional compressed audio logarithmic amplifier circuit design, the indication is smooth and sensitive, and the meter does not start when it is turned on. It is equipped with a meter adjustment potentiometer, which can be used with most popular audio level meters on the market.<br><br>Note:Due to different production batches, slight differences in appearance not affect the use. Power supply: DC12-18V AC9-12 Color:Black Material:PCB<br><br>Package Contents: 1 * VU Level Audio Meter<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.