Function: It is designed to provide the voltage needed when we open the lamp and regulates the electrical current of the light once it is lit.
High Quality: We have tested so many times before sales, it is sure to exact installation and function the same or even better than the Original part. Plug-and-play with no need to program or code the car.
Package Includes: 1x Xenon Headlight Ballast Control Unit, 1x D3S Bulb(NO Igniter).