Selected Material: 13-pin to 7-pin trailer socket adapter. Made of premium material housing, weather-resistant and durable. Excellent Effect: 13-pin to 7-pin adapter. Establishes a secure connection between the main vehicle and the additional trailer, supporting the synchronous display of electronic signal lights from the vehicle to the trailer. Convenient to Use: Trailer socket. Skillful appearance, stable performance and convenient use. Easy to Install: Easy installation, plug and play. Application: Converts your car's 7-pin socket to a 13-pin female socket. Suitable for European standard trailers.