3-hole spark plug tester, 220V spark tester with LCD display, ignition tester adjustable operating frequency 200~9000rmp, spark plug tester adjustable test hole height for all 12V vehicles.

["3-HOLE DESIGN IGNITION SPARK TESTER: The spark plug tester has a 3-hole simultaneous test function, which can compare the spark strength of 3 spark plugs at the same time, and it can realistically simulate the engine's working conditions. Quickly and clearly test the quality of your spark plugs. The measuring process is more efficient and the results are more accurate","WIDE RPM RANGE & ADJUSTABLE FREQUENCY: The automotive spark plug tester has a wide range of adjustable RPM, the adjustment range is 200 to 9000rpm, and the frequency can be easily adjusted by turning the knob, you can adjust it according to your own needs, which is very convenient and easy to use","ADJUSTABLE HEIGHT CONSTRUCTION & WIDE COMPATIBILITY: The test hole part of this spark plug tester can be raised by the knob to fit more long spark plug designs. The spark plug test hole is suitable for all spark plugs with a 12mm diameter. Suitable for almost all 12V gasoline engine spark plugs, wide range of applications","LCD DISPLAY & PROTECTIVE COVER DESIGN: The panel of the DC 12V spark plug tester is equipped with an LCD display, which allows you to conveniently check the current speed of the ignition coil being tested. The transparent protective cover protects your safety when testing spark plugs and allows you to clearly observe the spark plug test","DURABLE MATERIAL & LIGHTWEIGHT DESIGN: This auto spark plug tester is made of durable and heat-resistant ABS material, which is shockproof and heat-resistant. Its lightweight and portable design fits in your toolbox for quick tests anytime, anywhere!"]