Easy plug-N-play installation. Plugs directly into your stock. No wiring.No ballast.No headaches. The last replacement you'll need. With 30000 hours of light and a waterproof aluminum casing. These bulbs might even outlast your car. 12 imported 3528 high-brightness lamp beads. The old double hook plug design is used for direct installation without modification. 4 resistors welded on the back can help stabilize the current and increase the life. Distinguish between positive and negative.