Compatible with A1 2011 2012 2013 2014 Headlight Control Unit Daytime Running Light Module Ballast Suitable 8X0907472

Daytime running light source module, direct replacement, immediate use. Stable performance, reduced maintenance costs. Material: Made of PCB, better heat resistance, ensuring stable performance even in harsh environments; Features: Auxiliary lamp built into or integrated in the vehicle headlight unit, used to close the low beam or high beam; Function: Able to regulate current and voltage, provide the voltage required to start the lamp, and adjust the current of the lamp after the lamp is lit; Make the vehicle more recognizable on the road and improve the appearance of the car.