Material: This Xenon headlight ballast is made of stable materials and is built for all kinds of driving conditions. It guarantees reliable performance and longer use. Compatible with Is250 Is250c Is350 Is350c Isf 2014 2015 2016 Function: The ballast is usually installed on the back or bottom of the headlight to facilitate starting the light and is an important part of the fluorescent or H-ID lamp. It allows the current to flow through the bulb, ensuring that the light stays on. It is connected to control the voltage and frequency of the current and ensure that the bulb receives the correct amount of power. Installation: This ballast is a direct replacement for your existing component. Designed to meet or exceed OEM specifications. Plug and play installation, no programming or coding required for the car. Quality: Made of materials that meet strict OEM requirements, this product offers stable performance and is an ideal replacement option. Note: To ensure you receive the correct item, please confirm that your OEM number matches the one in the description.