Features: 1.Ergonomic Design: This trailer plug and socket has the ergonomic design, which is easy to plug the trailer wiring and lights. It has a handle shaped body for a solid grip when plugging in or unplugging trailer wiring. 2.Hidden Terminals: This trailer socket has hidden terminal blocks. This helps protect the splicing points of the wires from dust, rain, and other threats. 3.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. 4.Wide Application: This set can be used to connect tail lights, brake lights, reverse lights, turn signals, trailer brakes and auxiliary power. 5.Easy to Install: This trailer plug and socket set is easy and convenient for you to install and remove, which has no complicated operation. Specification: Item Type: Trailer Plug and Socket_x000D_ Material: Metal_x000D_ Standard: 7 Pin_x000D_ Connection Definition:_x000D_ 1 Pin: Yellow wire turn left_x000D_ 2 Pin: black wire reverse headlights_x000D_ 3 Pin: White wire bottom line_x000D_ 4 Pin: Green wire turn right_x000D_ 5 Pin: Blue wire Service brake_x000D_ 6 Pin: Red wire Brake light_x000D_ 7 Pin: Brown wire taillight, measuring mark light_x000D_ Application:_x000D_ Suitable for RV, caravan, trailer