UNIQUE DESIGN: Designed according to the trailer adapted to 13 pins of European standard vehicles: Establishes the stable and safe link between a main vehicle and towed vehicle, and transmits the electrical lamp signal to the trailer SINGLE USE: Suitable for most modern vehicles Equipped with the 13-pin input socket, Attaches very easily to a 13-pin car socket to connect a 7-pin trailer socket at the output and is also easily removed after use CUTE AND PRACTICAL: The adapter is very small in a cute size but very practical, quite solid, so it does not bother at all if you leave it on the vehicle all the time, it easily locks onto the 13-pin socket with a 1/4 turn like all caravan sockets USE AND DETAILS: After pushing the adapter halfway into the socket, you must turn it 90 (1/4 turn to the right) clockwise, this finishes fitting it and secures it. Finally the cap of the female socket on my car fits perfectly on the adapter, preventing it from rotating, there it no longer moves at all, for the protected design, we have the cover with a spring hinge protects well the socket contacts to 7 plugged in SIZE AND ATTENTION: Size of 8*8*4.7cm, before you order, please check the socket of your car, if you have any question, send the message for the first time please