Description: 【Material】Car Spark Plug Tester is used to test the performance and ignition strength of spark plugs. It is made of pp structural material (ABS), which has good heat resistance and impact resistance, and can prolong its service life 【Humanized Design】The Automotive Engine Ignition Plug Analyzer comes with the latest car spark tester with a special protective cover design. Cover the protective cover before use to stop of the operator during the test and observe the test results visually 【Adjustable Working Frequency & Protective Cover Protection】The working frequency of the spark tester automotive is 200-9000rpm. The higher the frequency, the stronger the spark intensity. The working frequency can be adjusted by the button, you can adjust it according to your needs, it is very convenient 【Three Hole Testing & Real Simulation】The spark plug tester has a three-hole test function. Three spark plugs are compared at the same time to improve efficiency. It can truly simulate the working conditions of the engine. The measurement process is more efficient and the measurement results are more correct 【Easy Operation Plug and Play】The operation of this Automotive Ignition 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. Digital screen displays the working rpm for more correct control   Specification: Material:PP,Metal Size Chart: 13.5cmx12.5cmx12cm/5.31inchx4.92inchx4.72inch Package Includes: 1x Spark Plug Tester 1x Test Clip 1x US Adapter Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.