Specific Xenon adapter for upgrading halogen headlights to HID Xenon headlights for Audi Q3 8U High quality adaptation Only one set is needed for both headlights Scope of delivery: Xenon adapter Notes: The added single wires must be connected to the on-board power system control unit in order to release the Bi-Xenon switch Please keep in mind that in some countries it is against the law to use HID headlights without automatic leveling