Feature:1. This module uses professional microphone amplifier IC, which possess high sensitivity2. Sound sensor module have small volume and low output noise, the fixed gain is 20dB, support 3.3v and 5v3. Low power consumption of sensor is easy to control, more stable and more efficient4. Microphone sound sensor module possess small size, more stable performance and simpler installation5. The sound sensor is suitable for assembly, and installed on various small equipment like microphone and robotSpecification:Item Type: Sound Sensor ModuleDo: When the sound intensity reaches a certain threshold, output high and low level signals. (threshold sensitivity can be adjusted by potentiometer)1. There are approx. 3mm / 0.1in mounting screw holes2. Use 5V DC power supply3. With analog output4. Threshold flip level output5. High sensitivity microphone6. With power indicator7. The comparator output has indicator lights.Package List:5 xSound Sensor Module