Excelvan Automatic ON/OFF Car Led Daytime Running Light Relay Harness DRL Control High quality, lightweight, waterproof, durable Easy install no need to change any line When starts the car engine, the DRL will turn on automatically Turns off the engine, the LED daytime running light delay 12 seconds to let you reach your home A dimmer control reduces the LED daytime running lights, when turns on the headlights or dashboard lights