TLILY Spark Plug Tester Tester+Two 12mm Socket Coil US

[Working principle]: The working principle of automotive spark plug tester is to test the spark plug performance and ignition strength by simulating the actual work of the engine.This tester is used to test spark plugs (12 mm diameter) for 12V gasoline vehicles, motorcycles, lawn mowers, garden , scooters, snow blowers, boats and so on [Dual Hole test and time saving]: Two spark plugs can be tested at the same time.Insert the new spark plug and the spark plug to be tested into the spark plug socket.By comparing the working performance of the two spark plugs, it can be intuitively determined whether the spark plugs need to be replaced [Adjustable operating frequency]: Spark Plug Tester Dual Holes operating frequency range is: 0-6000 rpm, and the frequency can be adjusted by turning the button.The higher the frequency, the greater the energy output used to test the ignition performance of the spark plug [Easy to operate]: First, just plug the spark plug into the socket, then put the