Check the listing for details. Car Spark Plug Tester 5 Holes Spark Plug Analyzer Adjustable test hole height. Condition: New. Listed at 69.99 USD. In automotive ignition systems, spark plugs shunt their shunt to form a high-voltage ignition coil into the cylinder engine, and sparks between the spark plugs will ignite the mixture. A detector can distinguish between good and bad spark plugs by the strength of the spark. With the function of simulating the engine working condition, it can be tested according to the performance of different spark plugs.Upgrade spark plug test hole design The diameter size of the hole 12mm is suitable for most 12V automobile spark plugs, the test height is adjustable to support BMW, Volkswagen, Audi and other models, the spark plug end is longer and more widely applicable.Wide Range Of Operating FrequencyThe operating frequency range can reach 200-9000 rpm, simulate real rpm with high accuracy, which greatly improve the test accuracy and work efficiency.Safety cover Closing the protective cover before testing effectively prevents sparks from harming personnel.LCD DisplayThe built-in digital color screen displays the working frequency. You can view the actual speed in real time and adjust it in time through the "+" - "button to obtain more accurate measurement results.Standard Comparison Test1 standard test hole and 4 comparison test holes. Confirm the standard test position to make an obvious contrast to the tested spark plugs.You can test and compare 5 spark plugs at the same time, which not only improves test efficiency, but also saves time and money.SpecificationsInput power: AC 110V±10% 50Hz/60Hz;Output power: DC12V±2 1A;Analog speed: 200~9999 rpmAmbient temperature: 0℃~+45℃;Relative humidity: