1、Versatile Application: This adaptor is used for electrical connections between vehicles and trailers with a 12 volt electrical system. Suitable for use with trailers, caravans, cars, towbars, bike racks, trucks, motorhomes, and RVs. 2、Durable and High Strength: Made with a high strength, durable nylon shell, this adaptor stands up to harsh road and weather conditions without easy breakage or damage. 3、Rust and Corrosion Resistance: The adaptor features a copper design and is waterproof, enabling it to offer better rust resistance and prevent corrosion, enhancing its durability. 4、Convenient Usage: If your vehicle and trailer or caravan have different plugs and sockets, this adapter will provide an easy and convenient solution for the electrical connection. 5、Main Function: Makes a secure connection between your main vehicle and the additional trailer, transfers the electronic signal lights from the vehicle to the trailer.