1Ergonomic 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. 2Hidden Terminals: This trailer socket has hidden terminal blocks. This helps protect the splicing points of the wires from dust, rain, and other threats. 3Protective 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. 4Wide Application: This set can be used to connect tail lights, brake lights, reverse lights, turn signals, trailer brakes and auxiliary power. 5Easy to Install: This trailer plug and socket set is easy and convenient for you to install and remove, which has no complicated operation.