General description This 12V Vehicle Car Trailer Tester is designed to quickly diagnose circuit failures in both vehicles and the 12V electrical systems on trailers. It features a user-friendly design that allows you to easily check connections and identify issues with the lighting and cable systems. Technical specifications Voltage: 12V Size: 19.7 x 5.3 x 4.3 cm Material: ABS + copper Color: Black Measurement allowed error: +/- 1-3 cm Compatibility and accessories Compatible with 7-pin connectors Includes 2 adapters Usage Insert the tester into the socket or plug to be tested Press the test button to receive a diagnosis via the LED display Signal lights indicate whether the trailer or car coil is connected properly Other information Portable and easy to store with a hand-held design Ideal for commercial and private use, including workshops, car and trailer rentals, and accessory trades Note: Light and different displays may cause the color of the item in the picture to differ