Features: Suitable for European standard trailer. Establishes a secure connection between your major vehicle and the additional trailer; Transfers the electronic signal lights from the vehicle to trailer. Converts the 13-pin socket on your car to the 7-pin female socket. Supplies power to your caravan, towing and truck. Slim line design: same diameter as a normal trailer plug and just over half the length. Plastic housing prevents rusting and enhances appearance. Waterproof for all road and weather conditions.