The Automotive Automatic Headlight Sensor Headlight Delay Switchautomatic Street Lightlight Control Delay Power input: 12VDC Current:&gt; 500mA The maximum load of the relay: 220V 10A or 30V 10A (less than this requirement can be used) Delay time :1-180 seconds (also can be customized range of other times, please contact the seller) This module is the photoresistor for the detection of the light intensity are generally used to detect the brightness of the ambient light; PCB Size: 60mm X 43mm