Feature:1. Aluminum: This trailer plug and socket is made of aluminum for durability and long life, able to withstand long term use and harsh environmental conditions2. Multifunctional: 7pin on the socket provide interfaces for different functions, such as rear fog lights, brake lights, license plate lights, etc.. Widely used for all kinds of commercial vehicles, trailers, cars, motorhomes and ships.3. European Standard: The plug and socket set is suitable for use in European market trailers and vehicles, ensuring compatibility with other European standard equipment and connection stability.4. 12V Operating Voltage: Designed for 12V operating voltage, it can provide stable power supply, ensure the normal operation of trailer and truck system, and provide guarantee for driving safety.5. Easy Installation: The plug socket connector is plug and play, allowing for easy and swift installation without any need for additional tools or expertise.Specification:Material: AluminumNumber of Cores: 7 pinFunction:PIN 1: Yellow Wire (Left/Horizontal Direction)PIN 2: Blue Wire (Rear Fog Lights)PIN 3: White Wire (Ground Circuit)PIN 4: Green Wire (Right/Horizontal Direction)PIN 5: Brown Wire (Right Tail and License Plate Lights)PIN 6: Brake LightsPIN 7: Black Wire (Left Tail and License Plate Lights).Package List:1 x Trailer Plug 1 x Trailer Socket