Can detect the intensity of the sound environment, use note: the sound sensor can identify the presence of sound(according to the principle of vibration) or a particular frequency of sound does not recognize the volume of the sound.Sensitivity adjustable digital potentiometer to adjust (blue)working voltage 3.3-5VOutput form:digital switch output (0and 1)Has a fixed bolt hole, convenient installationSmall board PCB size: 3.2 cmx1.7 cmModule wiring:VCC voltage is 3.3 V to 5 V converter (which can be directly connected to 3.3 Vor 5 V single-chip microcontroller)GND external to GNDOUT of small plate switch output interface (0 and 1)Instructions:Sound module is the most sensitive to the environmentsound intensity, commonly used to detect the intensity of the sound of the surroundings.When module in the intensity of the sound environment can not reach set threshold, the OUT will output high level, when the intensity of the sound from the outside environment more than set threshold, the module OUT output low level;Small digital output board OUT can be directly to the microcontroller, through single chip microcomputer to detect the high and low level, thus to detect sound environment;Package included:1 x Microphone Sound Sensor Module