Product Name: Automotive Spark Plug TesterProduct material: plastic+stainless steelProduct weight: 80gProduct size: As shown in the pictureProduct function: Used to test whether the car ignition system is working properlyTesting method:1. Turn off the engine and remove the spark plug coil.2. Connect the black skin of the tester to the spark plug.3. Connect the metal end of the tester to the spark plug coil.4. Start the engineIf the ignition wire is intact, the indicator light will flash.Detail display1. High quality material selection with built-in card core, convenient to use2. High voltage resistant wire, made of pure copper wire inside, can withstand the test of high voltage current3. High brightness neon light bulb High brightness light bulb, long-term use without heating, long service life4. The metal joint spark plug type metal head connection is convenient and wear-resistant and durable