12V 7-Pin Trailer Tester Plug RV Connector Tester Plug Tool Socket Adapter for Trailer(European Specifications) High Quality ABS & Copper (It needs a 7 pin blade)Made by high quality ABS and Copper, frosted surface, 7 pin trailer tester plug is durable and reliable to use, ensure maximum strength and durability for long lasting usage. Such a practical trailer tester tool you will need it_x000D_ Wide Applications The 7 pin trailer truck vehicle tester plug is widely suitable for 12V Caravan, RV, Recreational, Vehicle, Truck, Vehicle, Trailer, etc. Size: approx. 20 * 5 * 4cm; Battery Type: 9V (not included, you need additional purchase)_x000D_ 7-Pin Trailer Tester This 7 pin trailer truck rv connector tester has one side to connect the 7-pins plug of a trailer and another side to connect the 7-pins socket of a car. This tester indicates quickly if a failure concerns the wiring of the car or the wiring of the trailer, which can effectively test what the problem is for 7 pins plug and socket connection._x000D_ Safe Performance & Reasonable Design The 7 pin trailer truck tester plug with safe and dependable performance, reasonable design. Deft appearance, convenient usage. Reliable quality and delicate workmanship persuades you to take this one to replace the old._x000D_ Easy to use: European standard trailer connector for ease of use and storage._x000D_ _x000D_