Automotive Spark Plug Tester Engine Ignition Coil Tester for 12V US Adapter

[With Protective Cover]For safety, the tester is equipped with a transparent protective cover to prevent accidental contact with the spark plug during testing. [Easy To Use]The tester features a dual hole testing function, allowing for simple use. Just place a new spark plug and the spark plug to be tested into the testing holes for a quick and accurate performance evaluation. [Adjustable]It operates within a range of 500-6000rpm, with the working adjustable via a knob for precise control. [Applicability]This tester is suitable for most 12V gasoline car spark plug and suitable for 14MM and 16MM spark plug. Please note that it is not suitable for use with lawnmowers and chainsaws. [Dual Holes Spark Plug Tester]This Spark Plug Tester is a compact engine diagnose tool designed to simulate car ignition for testing the performance of spark plug, helping you determine whether a replacement is necessary. Specification:material: ppPower adapter: input 100-240V / output 12V 1A DCSize Chart:14.5cmx8.5cmx11cm/5.71inchx3.35inchx4.33inchPackage Includes:1x spark plug tester1x power adapter (US adapter)1x User Manual (English)Note:Please allow slightly errors due to manual measurement and different monitors.