The Philips H7 LED Upgrade Kit - 451753 is a comprehensive kit designed for upgrading the lighting system of a car. It includes various types of products that will improve the visibility and overall appearance of the car's headlights. The kit contains two LED bulbs, a pair of ballasts, and a set of wiring harnesses. The LED bulbs are designed to replace the traditional halogen bulbs and provide brighter and more efficient lighting. The ballasts are responsible for regulating the power supply to the bulbs, ensuring they function properly. The wiring harnesses connect the bulbs and ballasts to the car's electrical system. This kit is suitable for most car models and is easy to install, making it a convenient option for car owners looking to upgrade their headlights.