KY-038 Small Microphone Sound Sensor Module

Sound Sensor Module KY-038 Microphone Sound Sensor Module Analog Digital Output Kit Sound Sensor Board Specifications: Electric condenser microphone Features Single channel signal output Low level output signal used for sound control light Great module for sound alarm system Working voltage: DC 4-6V Interface definition: AO: analog output sensor GND: ground VCC: Power supply input range: 3V-24V. DO: Digital Output (comparator output) Two red LED indication: POWER and SENSOR. POWER: Power is off. SENSOR: When the microphone senses sound reaches a certain value,this LED light.