Check the listing for details. Spark Plug Tester Three Hole 12V Petrol Car Engine Ignition System Coil Analyzer. Condition: New. Listed at 54.99 USD. This spark plug tester is used to test the performance and ignition strength of spark plugs. It is made of high-quality thermoplastic polymer structural material (ABS), which has good heat resistance and impact resistance, and can prolong its service life. It can be used to test 12mm diameter 12V gasoline vehicles and is compatible with 99% of the spark plugs of crankshaft engines and motorcycles on the market.Simulate RPM Testing This feature simulates the operational status of the spark plugs during engine operation, offering adjustable simulated RPM. Comparative Testsing It enables the simultaneous testing of two test spark plugs andone new spark plug for more straightforward testing outcomes.Safety Cover Prior to testing, close the protective cover to effectively prevent injury from sparks to individuals.Digital Screen Display Provides a clear display of simulated engine RPM for enhanced precision in control.Three-hole Design Allow simultaneous testing of three spark plugs, ideal for examining 12V car spark plugs.Adjustable Test Hole Height Compatible with BMW, Volkswagen, Audi, and other models with longer spark plug ends, wider applicability.Specification: Input Power: AC110/220V ± 10% Output Power: DC 12V ± 2 1A Simulated RPM: 200-900rpm Ambient Temperature: 0℃ - 45℃ Relative Humidity: