specification: 

Working voltage:DC 3.3V-5V 

signal output indication 

single channel signal output 

the output effective signal is low level 

when there is sound，outputs low level and the signal light 

can be used for Acoustic control light ， give sound and light alarm working with Photosensitive sensor ，and sound control，sound detect 

Circuit board output switch quantity  

The Maximum induction distance is 0.5M   

package: 1 x Arduino module sound sensor