This module uses professional microphone amplifier IC, which has low output noise, small size, high sensitivity, fixed gain of 20dB, and can support 2 power supply modes of 3.3v and 5 V.

Specifications:

• Electret condenser microphone (ECM) sensor with high sensitivity
• Power indicator light
• Comparator output indicator
• AO, real-time microphone voltage signal output
• DO, high/low level signal output
• Analog output
• Threshold flip level output
• Adjust the sensitivity by potentiometer