1.Versatile Design: This dual-output trailer wiring adapter makes it easy to tow different trailers with your vehicle, equipping it with a standard 7-way RV blade socket while retaining use of the existing 4-way flat wiring. 2.Weather Resistant: This trailer wiring harness adapter comes with dust covers for the 4-pin and 7-pin wiring sockets to the terminals from water, dirt and corrosion. The wiring harness is also - with the included slit loom sleeve. 3.Standard Connection: This trailer hitch wiring adapter plugs into any standard 4-way flat and can be used to connect the taillights, brake lights, turn signals, reverse lights, trailer brakes and auxiliary power (some splicing required). 4.Easy to install: This dual-output 4-pin to 7-pin trailer adapter wiring comes to plug into your vehicle or trailer wiring with splicing required. It also includes a mounting bracket for convenient attachment to your hitch or bumper. Plug:7-Way to 4-Way Flat Colour:Black Material:PVC Package Contents: 1 * Trailer Adapter Plug 1 * Mounting bracket 6 * Nut 6 * screw Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real . The measurement allowed is +/- 1-3cm.