It is a sensor that incorporates a microphone. This module has 2 exits. On the one hand, it delivers an analog audio signal and on the other a digital signal that is activated from a sound threshold that is adjustable through the built -in potentiometer
Power LED Indicator
Power supply: 5V
Dimensions: 43 x 16 x 14 mm / 1.69 x 0.63 x 0.55 inch