1. It can detect the sound intensity of the surrounding environment. Note: This sensor can only identify the presence or absence of sound (according to the principle of vibration) and cannot identify the size of the sound or the sound of a specific frequency 2. Adjustable sensitivity 3. Working voltage: 3.3V-5V 4. Output form: digital switch output (0 and 1 high and low level) 5. Equipped with fixing bolt holes for easy installation 6. Small board PCB size: 3.2cm x 1.7cm 7. Module wiring instructions: -VCC external 3.3V-5V voltage (can be directly connected with 5v single-chip microcomputer and 3.3v single-chip microcomputer) -GND External GND -OUT small board switch output interface (0 and 1)
