- Function and benefits: Headlight driver module automatically reduces beam height on narrow streets to avoid lighting pedestrians or oncoming vehicles. It also auto-activates in low-light environments so you don’t have to operate it manually. - Compatibility and reliability: Uses a C-BUS smart chip for high compatibility with vehicle systems and to minimize interference with the vehicle computer. Fully automatic installation kit with a fault rate of less than 1%. - Custom fit and installation: Custom-made according to the vehicle number specifications. Integrated mounting brackets and through-hole components are designed for direct installation and replace the original auto parts. Part number: 63117316217. - Compatibility check: Please verify before purchase that the product fits your vehicle. - Use scenarios: Driving in urban areas with pedestrians on narrow streets; approaching poorly lit roads or streets from brighter to darker lighting conditions; entering tunnels or transitioning between light and dark environments.