Features: 1.Protective Function: Provide additional protection with spring cover and high dust resistance to avoid damage to the external environment when the adapter is not in use. 2.Hidden Terminal Block: This trailer socket has hidden terminal blocks. This helps protect the splicing points of the wires from dust, rain, and other threats. 3.Premium Material: This trailer socket is made of premium metal material, which has strong strength and high performance. And it is stable and sturdy. 4.Wide Application: It can be used to connect tail lights, brake lights, reverse lights, turn signals, trailer brakes and auxiliary power. 5.Easy to Install: This trailer socket is easy and convenient to install and use, which has no complicated operation for you. Specification: Item Type: Trailer Socket Material: Metal Standard: 7 Pin Connection Definition: 1 Pin: Yellow wire turn left 2 Pin: black wire reverse headlights 3 Pin: White wire bottom line 4 Pin: Green wire turn right 5 Pin: Blue wire Service brake 6 Pin: Red wire Brake light 7 Pin: Brown wire taillight, measuring mark light Application: Suitable for RV, caravan, trailer