The adapter / reducer ADAPTER 7/13 from the renowned German brand Aroso is suitable for all bicycle carriers for towing equipment from the manufacturers Aroso, Thule, Jetbag, Atera and others. Use the reducer if you have an older type of vehicle with a towing device equipped with a 7-pin electrical socket. Please note - modern towing equipment carriers do not support reversing and fog lights via the 7-pin socket, these only work via the original 13-pin socket on the vehicle.