Feature: 1. High Strength: This tester is used to test the performance and strength of spark plugs at a frequency of up to 9000 rpm. The higher the frequency, the stronger intensity of the spark plug. 2. 5 Hole Design: This tester can also simulate real speed and digital control for five holes at the same time, thus greatly improving the accuracy and efficiency of the test. 3. Wide Compatibility: Automotive spark plug tester also has a wide range of compatibility. It is suitable for testing all crankshaft engines and motorcycle spark plugs. 4. Plug and Play: Confirms the standard test position and creates a clear contrast with the spark plug under test. Plug and play, easy to operate, connect and test. 5. Digital Display: Spark plug analyzer with digital screen display, more convenient for you to compare and provide more accurate control. Specification: Item Type: Car Spark Plug Tester Material: ABS + metal alloy Test Hole: 5 Input Power: US Plug 110-240V Output Power: DC12V±2 1A; Analog RPM: 0-9999 RPM; Ambient Temperature: 0℃-+45℃ Relative Humidity: < 85%; Main Features. 1: Working frequency up to 9000 rpm, the higher the frequency, the higher the intensity of the spark plug; 2: Digital display screen, more accurate regulation; 3: Simultaneous comparison of five holes, to improve efficiency; 4: Simulation of the real speed, high accuracy; 5: Easy to operate, plug and play;. Package List: 1 x Car Spark Plug Tester1 x Charger1 x Manual Note: 1. Do not unplug the spark plug with electricity, if you want to insert or remove it, you must first turn off the power;2. Spark plugs work, the voltage reaches tens of thousands of volts, do not touch with your hands, so as not to cause injury to the body;