Feature●Used for H4 halogen upgrade to LED bulbs installation.●Only for halogen headlamps! This will allow you to place any aftermarket LED bulb firmly, quickly on the original headlamp housing without destroying the original socket!●Why do you need this adapter?Because the LED bulb cant be installed steady when you replace the origin car bulbs, our adapter is designed to solve this problem.●Easy to install, directly plug into your factory headlight housing socket, no modification needed.●Note: Please open the hood and compare this product with the stock LED headlamp socket, you can make sure whether this product is for your car.Description