Trailer Wiring Tester 12V 7 Pin and 13 Pin Socket Circuit Plug for Auto Tow Lights Features： 1、12V electrical trailer plug & socket wiring tester. 2、One end connecting the trailer 7 plugs and the other end connecting to car's 7pin plugs and sockets. 3、With LED indicators, can indicates failures in the wiring circuits on the car or trailer. 4、Suitable for 7-pin plugs and sockets, including 13-pin plug and socket. 5、Made of high quality plastic material, lightweight and durable. Specification： Features: One end connecting the trailer 7 plugs and the other end connecting to car's 7pin plugs and sockets. With LED indicators, can indicates failures in the wiring circuits on the car or trailer. Made of high quality plastic material, lightweight and durable. Specification: Material: ABS + Brass Color: Blue + Black Package Weight: approx. 361g/12.7oz Application: can be used for trailers, caravans, bicycles and so on （ for European Vehicles only ） Package list: 1 * 7Pin to 13Pin Trailer Socket 1 * 7Pin Tester Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Package List：