General description Trailer tester can help you quickly check the circuit failure of both vehicles and 12V electrical systems on trailers. Simply insert the light and cable tester into the socket or plug to be tested, press the test button, and make a clear diagnosis via the LED display. It is easy to use and convenient, suitable for both commercial and private use, including workshops, car and trailer rental, and accessories. Technical specifications Voltage: 12V Size: 19.7 x 5.3 x 4.3 cm Material: ABS + copper Color: Black Weight: Not specified Compatibility and accessories Compatible with 7-pin connectors Package Contents: 1 x Trailer Tester, 2 x Adapter Usage The tester's indicator light will quickly indicate whether the trailer or car coil is properly connected and indicates faults in the vehicle or trailer circuit. Other information Note: Light shooting and different displays may cause the color of the item in the picture to differ slightly from the real thing. The measurement