Using photoresistor induction to detect light intensity with relay for direct load control Adjustable sensitivity with potentiometer to set relay activation threshold; relay energizes in dark conditions below threshold and de-energizes when light exceeds threshold 12V power input designed for relay board regulator transistor to provide stable sensor operation Onboard optocoupler isolation for relay drive, providing effective protection for the chip and ensuring reliable performance Four mounting holes for easy installation Material: Metal Color: Blue Wiring included; wire color may vary randomly Module instructions: 1. The photoresistor module is sensitive to ambient light and is commonly used to detect surrounding brightness 2. When ambient light is darker than the set threshold, the relay energizes, connecting the common terminal to the normally open terminal. When ambient light is brighter than the set threshold, the relay de-energizes, connecting the common terminal to the normally closed terminal 3. The common, normally open, and normally closed terminals function as a dual-control switch. When the relay coil is powered, the common terminal conducts with the normally open terminal. When not powered, the common terminal conducts with the normally closed terminal Supply voltage: 12VDC Current: 100mA Load capacity: 250V 10A AC or 30V 10A DC (suitable for loads within or below these ratings) Dimensions: 5.3cm x 3cm Quantity: 1 piece Package includes: 1 x DC 12V Photoresistor Module Relay Light Detection Sensor Light Control Switch Note: Wire color is random; specific color requests cannot be accommodated Note: Lighting and display differences may cause slight variations between the product color in images and the actual item. Measurement tolerance: +/- 1-3cm