Features: 1.When the car starts, the voltage must be higher than 13V and it will automatically turn on. When the headlights are turned on, the lights dim, the voltage must be lower than 12.5V when the car is turned off, and the lights go out after 15 seconds. 2.Intelligent controller design, with constant light, dimming, delay, automatic switching and other functions. 3.The shape is small and portable, easy to carry and store. The waterproof design is practical and has a long service life. 4.The product is made of high quality ABS material, strong, corrosion resistant, durable, and can be used with confidence. 5.Easy installation, no need to replace wires, total power of 1 pair of daytime running lights does not exceed 18W, universal type. Specification: Item Type: Daytime Running Light Controller Material: ABS Working Voltage: 12-24V Function: Intelligent voltage detection Applicable Model: Universal type PackageList: 1 x DRL Controller