Compass Trailer Socket 7-pole

This highly practical tool should definitely be apart of any vehicle set-up. It is ideal when connecting to a towing device. By simply attaching the tester to a car socket or trailer, you will find out if the lighting is fully functional. Not only do you avoid a possible fine, but you also avoid unnecessary accidents. The tester is designed for seven-pole plugs. However, with the help of adapters (not included), you can also test all thirteen-pole sockets in a seven-pole function. Last but not least, you will be pleased with the easy-to-use control and the detection of whether everything working properly - using LEDs.

Power supply:
9V battery (not included)