Flashtech Color Changing Halo kits are the most advanced SMD LED halo ever designed. They have a wide array of ways to be hooked up and can be modified in the future without having to buy new halos again and again. Your kit will come with LED rings and External LED Drivers. Instead of having everything built into the ring as old halos were built, Flashtech has designed an external driver which allows this item to be mounted outside of the headlight. If a failure occurs a simple replacement of the driver will fix most problems rather than having to open up the headlights to replace a ring.