The module has 2 outputs:
1, AO, analog output, real-time output microphone voltage signal
2, DO, when the sound intensity reaches a certain threshold, the output high and low level signal [threshold - the sensitivity can be adjusted by the potentiometer]
 
Module Features:
1, with 3mm mounting screw holes
2, the use of 5v DC power supply
3, with analog output
4, there is a threshold flip level output
5, high sensitivity microphone
6, with power indicator light
7, the comparator output indicator light