VU Meter Driver Board DB Audio Level Meter Drive Module Power Amplifier DC 12V Accessory Item Type: VU Meter Driver Board Material: PCB Project Type: VU meter driver board DB audio level instrument. Input Sensitivity: 400Hz input audio signal, 8025B digital multimeter range. AC mV Measurement Input: 97mV, 39 level to +3dB position. PCB Size: Approx. 63 x 52 x 20mm / 2.48 x 2.05 x 0.79in Backlight Power Terminal: DC l0V to 12V 50MA can be used. Small bulb power backlight. VU Meter Driver and Liquid Level Gauge Sensitivity: Recommended 500uA sensitivity, 630 Ω. The damping effect is the best at this time. The damping effect of other specifications of liquid level gauges will be different, and further adjustment is needed.