UNIQUE DESIGN: Designed according to the trailer adapted in 13 pins of the European standard vehicles: Establish the stable and safe link between a main vehicle and the towed vehicle, and transmit the electrical signal of the lamp 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 dismantled after use > CUTE AND PRACTICAL: The adapter is very small in cute size but very practical, strong enough, so it does not bother at all if left on the vehicle all the time, it easily hangs on the socket at 13-pin with a 1/4 turn like all caravan sockets USE AND DETAIL: After pushing the adapter halfway into the socket, it must be rotated 90 (1/4 turn on 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 does not move at all, for the protected design, we have the cover with a spring hinge well protects the contacts of the connected 7 plug SIZE AND ATTENTION: Size of 8 * 8 * 4.7cm ,before you make the order ,please check you car socket ,if you have any question ,send message for the first time please