1.100% brand new and high quality
2.Sound module is sensitive to the environment, generally to be used to detect the intensity of the ambient sound.
3.If the module can not reach to the threshold set in the environment of sound, OUT output high level. When the ambient sound level exceeds the set threshold, the module OUT output low level;
4.The digital output OUT on the small plates can be directly connected to the microcontroller, detecting the sound environment via the microcontroller detecting high and low level.
5.The digital output OUT on the small plates can directly drive relay module, which works as a voice-activated switch.