Item Type: Trailer TesterMaterial: ABS, copperSpecification: 13pinVoltage:12vMaterial: ABS, CopperColor: BlackFunction: Resistance test, detection of faults on the linePower Supply Mode: 9V PP3 Battery Required (Not included)Application:Suitable for RV, trailer1Trailer Tester: This tester has one side to connect the 13 pins plug of a trailer and another side to connect the socket of a car, makes it convenient to use.2Main Function: This trailer plug tester can help you to quickly check the circuit failure of both vehicles and the electrical system on trailers, and resistance test.3Durable Construction: Made of high strength ABS plastic and copper, which is impact resistant, wear proof, anti aging, and has long service life.4High performance: Using brass as conductor, with good electrical conductivity, ensuring more stable function and high practicality.5Fine Workmanship: Requires 9V, PP3 battery power, (not included), can test trailer, caravan lights without attaching to a vehicle, very simple to use.1 xTrailerTester