Easy operation: do each trailer passing light we have prepared 2 pieces of screws, they can be conveniently and easily mounted; Moreover, red and yellow is a positive electrode, and black is a negative electrode, the installation can be completed by tightening the screws. Fit different cars: these trailer marker lights are suitable jako LED marker lights,side car lamps, trailer lamps do many types of cars,such as trucks, trailers, trailers do koni,travel trailers, trailers do boats,motorhomes and other Waterproof design: our caravan lights do motorhomes have a completely closed circuit, are waterproof and protect against dirt; In addition, the lenses do not fade under the influence of sunlight and rainwater, which ensures a pleasant experience. Durable and easy to service: each RV signal light is made of high quality LED diodes and plastic, reliable, not easy do deformation and fracture, and can serve for a long time; The surfaces of these lights are smooth and comfortable to touch, no need to worry about scratching your fingers. Trailer marker light LED Improve the visibility of your vehicle. These do marker lights of the trailer are suitable jako marker lamps LED,side car lamps, do tacky lamps of many types of cars,such as trucks, trailers, trailers do koni,travel trailers, trailers do boats,camping vehicles and others. Waterproof construction Our lamps are resistant to any adverse weather conditions. Stay safe and visible while driving outdoors, especially in darker environments when it rains Excellent brightness High brightness for improved vehicle functionality, providing a wider and further range of visibility. It can be used wherever light is needed. Easy installation Everything is included dla easy installation. Needed such as foam tape and hardware package. Installation method 1. Determine the place of installation of the signal lamp, it should be mounted on a flat surface or a surface with a minimum curvature. 2. Za a marker, mark and drill 3 mounting holes in the lamp base. 3. Put the feed wire through the hole in the middle and secure both sides of the lamp with screws and nuts. 4. Connect the wires, black do of the negative pole, yellow (or red) do of the positive pole, and then turn on the power.