Automotive spark plug tester detector with two-hole spark plug analyzer diagnostic tool

This spark plug tester is an essential tool for diagnosing the condition of your spark plugs. It allows you to check the spark quality and determine if the spark plugs are functioning correctly. Thanks to its improved design, it is safer and more accurate to use. Technical Specifications: Adjustable frequency from 1,000 to 5,000 rpm; Standard power adapter (European standard); Three indicator lights show signal status; Capable of generating a high voltage exceeding 10,000 volts. Operation: Insert the spark plug into one of the two test holes. To compare a new spark plug with a worn one, insert the new one into hole 1 and the old one into hole 2. Plug in the device and turn the ignition key clockwise to switch it on. Adjust the operating frequency if necessary. Other Information: To avoid danger, do not touch the spark plug during use. A bright purple flash indicates a good spark plug, while a dark red flash indicates a worn spark plug.