Car Rain and Light Sensor Details: Light Sensor Advantages: A: Original swith still functional. B: Fit for each car model and light model, including H4 C: Simplely instation, no wire cut off, no effection to the car original functions D: Automatically active and deactive high/low beam headlight and dashboard light according to the surrounding light condidions. E: The sensetivity is adjustable F: Work automatically when start the engine, headlight turn on automatically when light dark or the car enter tunnel, garage. Rain Sensor Advantages: A: Original swith still functional. B: Fit for each car model C: 1/10 second reaction speed, will respons to the suddenly deterioration. keep you driveing safe all the way. D: Adjust the frequency of the wiper automatically according to the rain.