[European Standard]The small trailer plug simply plugs into the 13-pole plug Euro Standard Style plug and fits the other side into the 7-pin plug on most caravans / trailers.Notice: Black is the normal version which is for EU system(standard).[13 pin-7pin]1x trailer adapter 13-pin male - 12N and 12S 7-pin female.13 Pin to 7 Pin conversion,connecting a car and a trailer/caravan and supply to the trailer/caravan for all important indicators, signal light and fridge. Make vehicle and caravan/trailer electrics compatible when towing.[Twin 7 Pin Electrics]7 pin 12N electrics provide legal lighting which includes brake, indicator and fog lights.7 pin 12S electrics provide supplemental lighting such as reverse lights, interior lights and appliances+S plug to correct connection, and make it easy to get all your electrics up and running.[Easy To Install]Plug and play desig, without cable is used to connect the lights from the vehicle to the trailer with ease.Plug and play design, plug insert into socket, twist and lock, no need to change any cable.Insulated environmental PVC wires, waterproof performance.[Security]Locking springs Flap protects the connections when the article is not in use and locks into the 7 poles plug when in use.It also has an additional security that secures the attachment of the trailer to the adapter.Made of high quality material which has been given a mat-finish, providing a unique design and delicate feel.Material:PVCcolour:blackPackage Contents:4 x Towing AdapterOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.