55 pounds magnetic strength base will be holded so strongly to automobile metal surfaces, so lights never fell off during workingWire distance between lights is 7ft, Wire harness length is 20ft enough with 4 standard pin connectorsSuper bright LED with 100,000 hours life and Complies with DOT standardsScratch resistant magnetic base for easy Mount! Each kit have assembly and opearating Instructions for easy installing Ideal for towing applications up to 80 wide like Trailer, Boat, Truck, RV, Dollys, etcOperation: 1.Set the lights on the back of the vehicle being towed2.Set the lights so that the red side of each light faces backwards3.Set the light which corresponds to the green wire on the right sideSet the light which is attached to the yellow wire on the left sideThe Towing lights are now ready to be activated as you use the brakes and turn signals of the towing vehicle