Anti-collision LightsBuild your own car Avoid collisions and accidents The red light flashes quickly when the door is opened, indicating that the rear comes to the car to avoid the mudled light being the accident and collision. No wiring, will not destroy the original car route, just stick and use. The product is divided into warnings three times, the first 6 seconds (fast flashing). Specifications Item Type: Atmosphere Lamp Emitting Color: Red Blue Yellow RGB Power: 3V