Check the listing for details. Car Spark Plug Tester Dual Hole Diagnostic Tool Gasoline Petrol Ignition Analyze. Color: yellow, Condition: New. Listed at 29.99 USD. Car Spark Plug TesterAutool spt101 automotive spark plug tester is mainly used to test the performance and strength of spark plugs to help you judge the quality of spark plugs. It can be used to test spark plugs of 12V gasoline vehicles and 99% of crankshaft engines and motorcycles on the market.It can truly simulate the normal operation of the engine and help you judge the performance of the spark plug more accurately. Its working frequency can reach 6000rpm at most. It can also test two holes at the same time, and is designed with a protective cover, which is safer to use.Car Spark Plug Test PrincipleIn 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.Wide ApplicationThis product can be used to test the spark plugs of 12mm diameter 12V gasoline vehicles.It is compatible with 99% spark plug tests for crankshaft engines and motorcycles on the market.Adjustable Working FrequencyThe operating frequency is 0 ~ 6000rpm. Rotate the rotary switch to adjust the operating frequency as required. The higher the frequency, the stronger the spark intensity of the spark plug.Protection Cover DesignThe plastic protective cover can block the current released during the test, prevent you from accidental electric shock, and make it safer to use.Dual-Hole DesignThe spark plug tester has two test holes, one for the standard spark plug and the other for the spark plug to be tested. By comparing the spark intensity of the two spark plugs, the performance of the spark plugs to be tested can be judged.Humanized DesignThe operation of this spark tester is very simple. Just put the spark plug to be tested into the test hole, cover the protective cover, and then connect the power supply to start the test. It also has a power indicator and two high-voltage signal indicators, which can help you observe the test situation more intuitively.Packing List1* Car Spark Plug Tester main unit1* Packing box1* User manual1* Power supply connectorOperation StepsStep 1Place the spark plug in the test hole.Step 2Cover the protective cover.Step 3Connect the power supply & adjust the working frequency.Step 4Observe the spark plug test status through the protective cover.VISIT OUR STOREMORE PRODUCTSMORE PRODUCTS 3 WARRANTY&SERVICEDelivery DetailsVISIT OUR STORE MORE PRODUCTS MORE PRODUCTS 3 WARRANTY&SERVICE Delivery Details1.We will ship according to your EBAY address but sorry that we can not accept P.O.BOX address. Please make sure it’s correct . This will help your product to be received safely and quickly! 2.International Buyers Please Note: 1) Please check with your country customs office to determine what these additional Import tariffs costs will be prior to bidding / buying. 2) It's the buyer's responsibility to complete clearance when parcel reached your Customs. We are Not responsible for buyers's local taxes, please consult local Customs for Tax Details. Customs rates vary from country to country, please understand. 3. Any further queries, please don't hesitate to email us. Thank you