Microphone sound sensor module KY-038

Description: Using LM main chip Condenser microphone Features mono signal output Low volume output signal for sound control lights Loud sound alarm system Working voltage: DC 4-6V Interface definition: AO: Analog output sensor GND: Ground VCC: Power Input Range: 3V-24V. DO: Digital output (comparator output) Two red LED indicators: power and sensor. Power: Power off. Sensor: This LED lights up when the sound sensed by the microphone reaches a certain value.