VU Meter Driver Module Audio Level Indicator Power Meter Board 5 LED Level Indicating DC 5V-12VSpecification:Material: FR4Operating voltage: 3.5 ~ 16V、 15mASize: 42 x 30 x 11mmSuitable for: HIFI audio、 car stereo amplifier、 preamp、 amp、 microphone amplifying the audio signal level indication. And supporting the use of the current transformer、 it can also be used to test alternating current sizeFeature:5-Segment LED (3mm LED).5 Level only LED display is -10dB、 -5dB、 0、3dB、 6dB、 and analog level meter used in conjunction、 can be more comprehensive and accurate indication of the audio signal changes.USB interface power supply is easy to use、 with reverse power protection.Packing includeds:1 x Audio Level Indicator