using the photoresistor induction light intensity comes with the relay direct control load Distribution bit sensitivity adjustment start relay threshold set by adjusting potentiometer when the dark this threshold the module relay is energized bright this threshold the relay release; 12 V power input is designed for relay board regulator transistor to provide sensor Used to make the product more stable and reliable; onboard optocoupler isolation drive relay the effective protection of the chip to make the product more reliable work; has four fixed bolt hole for easy installation Material: metal Color: blue With linesLine color is multicolor Module using the instructions: 1 photoresistors module is most sensitive to ambient light generally used to detect the brightness of the ambient light. 2 the module when the ambient light is darker than the threshold value is set the relay is energized the common terminal and the normally start is turned on when external ambient light is brighter than the set threshold value the relay is switched off the common terminal and the normally closed end connected; 3 the public side normally open normally closed three ports the equivalent of a dual-control switch relay coil power public end and often the beginning of conduction radio public end normally closed terminal conduction; Supply voltage: 12VDC Current: 100mA Load: 250V 10A AC or 30V 10A DC the current is less than this range can be used Size: 5.3cm * 3cm Quantity:1Pc Package includes: 1Pc xDC 12V Photoresistor Module Relay Light Detection Sensor Light Control Switch Note: multicolor don't accept the specified color. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. About Us We provide the good product with the best pricewe support Wholesale/Drop Shipping Order 1. For Drop Shipping order please remark"dropshipping order" we will prioritize it. 2. For Wholesale/Drop Shipping orders if you have any ideas about the price or packageplease contact us in advancewe will give you the best service to satisfy your demands. About Shipments 1.We will send out the orders ASAP once your payment is completed normally. 2.Please write your complete delivery address with correct phone number and zip code especially please confirm your full name. About After-sale Service We are reliable seller and we have our professional after-sale service for all of our customers. If there is any question about the orderplease contact us in advance we will always here until you get a happy answer. About Feedback 1. Please check the package and item when you get carefully to make sure there is no problem. 2. If you have any problem or are not entirely satisfied with your packageplease don’t be hesitate to contact us first before leaving negative feedback. We will resolve the problem to satisfy you. 3. If there is no problem please leave us five star positive feedback. Your affirmation is our greatest motivation ! ! !