Check the listing for details. Car Spark Plug Tester Ignition Plug Analyzer Diagnostic Tool Dual Hole AH9. Condition: New. Listed at 24.39 USD. Specifications: Must-have diagnostic tool for any engine with a spark plug. Simple to use - just remove rubber boot from spark plug, insert tester & place tester boot on plug. Turn the engine over - if ignition is being sent to the cylinder, light in tester glows. Great time and frustration-saver with cars, motorcycles, boats, chainsaws, lawn mowers & more. Item Name: Spark Plug Tester Material: ABS + Metal Power Adapter Input: 100-240VAC Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Spark Plug Tester 1 x Power Adapter(US Plug)On Jul-16-21 at 23:55:02 PDT, seller added the following information: