Yuanjoy 7/13 Pole Trailer Coupling Tester 7 Pin RV Socket 12 V Vehicle with 13 to and Adapter

Simply plug the lighting and cable tester into the socket or plug to be tested, press the test button and the LED screen can provide clear diagnostic information CE EN61000, RoHS EN62321 certified, using high quality ABS+copper material, durable matte black housing 12V electric trailer plug tester, one end of the trailer 7 is connected to the vehicle's 7-pin plug and socket, normal European standards commonly used in cars, caravans, RVs and other vehicles With two adapters (13/7 and 7/13): you can also test the new 13-pin standard. Kit includes: 7 pin trailer plug tester, 13/7 pin adapter, 7/13 pin adapter You need a 9V square battery to activate the tester, otherwise it will not work (not included)