Color: Black Built-in Auto Light Sensor, Plug & Play, no need to Tie up any cable Supports Leaving Home and Coming Home functions. Fits For: VW Golf MK5 MK6 and Jetta MK5 (does not fit mk6 jetta) Passat B6 Touran Caddy Tiguan MK1 Battery protect function: if car battery low voltage,headlight will start working within 5-8 seconds after you turn on your car to protect car battery Tunnel Model: Headlight start working automatically when passing tunnel or shadow.