LDR Photoswitch Photoresistor 12V Relay Module

Apply photosensitive resistance to induct the intensity of the light, can directly control the load with attached relay module 
With a potentiometer to adjust the sensitivity, set the start relay thresholds 
Output type: Directly connect AC 220V 10A or DC30V 10A 
With 4pcs fixed screw holes, convenient to install 
PCB size: 5*2.6cm (L*W) 
Using wide voltage LM393 comparator