Features Function: This module adopts high-sensitivity professional microphone amplifier IC, with microphone and preamplifier, peak detector, buffer amplifier and Schmitt trigger on the circuit board. Small Size: The sound sensor module is small in size, low in output noise, has a fixed gain of 20dB, supports 3.3v and 5v, and the sound detector is a small board that combines a microphone and some processing circuits. Stable: This sensor has low power consumption, is easy to control, is more stable and more efficient, it provides not only audio output, but also a binary indication of the presence of sound and an analog representation of its amplitude. Easy Installation: The microphone sound sensor module is small in size, more stable in performance, and more convenient in installation, with mounting screw holes. Application: The sound sensor is suitable for assembly, installed on various small devices such as microphones, robots, etc., to ensure the best quality and safe use before leaving the factory. Specification: Item Type: Sound Sensor Module Voltage: 3-5V AO: Analog output, real-time output of microphone voltage signal Do: 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 holes 2. Use 5V DC power supply 3. With analog output 4. Threshold flip level output 5. High sensitivity microphone 6. With power indicator 7. The comparator output has indicator lights Package List: 5 x Sound Sensor Module Package List 5 x Sound Sensor Module