It adopts professional compressed audio logarithmic amplifier circuit design, the indication is smooth and sensitive, and the meter does not when it is turned on. This is a dual meter driver board, which must be driven by the pre-stage audio signal. It is equipped with a meter adjustment potentiometer, which can be used with most popular audio level meters on the market., Weight: 0.06944561253 Pounds, Manufacturer: Tuidzljd