Check the listing for details. Car Spark Plug Tester Dual Hole Diagnostic Detector Ignition Analyzer AC 100-240. Condition: New. Listed at 32.99 USD. Product Usage: 1.Place the Spark Plug into tester hole 1 or 2; If you want to compare the new spark plug and old one, place new spark plug into hole 1 and the old on into hole 2. 2.Connect to power supply. 3.Turn the key switch 4 clockwise to turn on tester, indicator 3 will light up, tester is now working at 1000rpm/min. 4.Again turn the key switch 4 clockwise,you can adjust the working frequency between 1000rpm to 6000rpm/min. The higher the frequency, the stronger the spark strength. Specification: * Mold:spark plug tester * Input: 100~240V AC * Length of external: 1m * Host size: 145*90*114mm * power supply: Power Adapter * Power Adapter: Output 12V 1A DC * Suitable for 12V driven gasoline car spark plugs * Usage: Test car spark plug performance and ignition intensity Note: 1.Please Turn Off Power before you place spark plug. 2.The Spark Plug Tester is a high-voltage detector, so do not touch spark plug with hand at work to avoid danger. 3.Support 12V Gasoline vehicles car spark plugs only. Package included: 1 x Spark plug tester 1 x Power Adapter On Aug 20, 2024 at 09:39:09 PDT, seller added the following information: