Feature 1The dualhole spark plug detector has two testing holes, which can detect two spark plugs at the same time. 2If the spark plug is found to be working improperly, a comparative test can be conducted to make an accurate judgment. 3Application range of ignition plug analyzer is 12V gasoline vehicles car spark plugs. 4The main function of the adjustable twohole automotive spark plug detector is to test spark plug performance and ignition intensity. 5With elaborate manufacturing technology, has high reliability and stable performance.Item Type: Spark PlugTesterMaterial: PlasticPlug Type: AU Plug Wide Voltage 100-240VCar Spark Plug Test Principle:In automobile ignition system, the high-voltage ignition coil generates a high-voltage (10000 volts or more), and the spark plug diverts it form high -tension ignition coil into the cylinder engine, spark between the spark plug electrodes will ignite the mixture. The Detector could tell the good spark plugs from the bad by the strength of the spark.Power Adapter: Input 100-240VAC / Output 12V 1A DCApplication Range: 12V Gasoline vehicles car spark plugs .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 xSpark PlugTester1 xPowerSupplyDevice1 x ManualNote1. Turn off the power before placing the spark plug2. The spark plug tester is a high pressure detector, do not touch the spark plug when working, in order to avoid danger.