Wear-resistant rubber construction delivers durable performance across a wide temperature range. Enhanced diagnostics with accurate problem detection and quick insight into ignition issues. Easy troubleshooting: smart LED indicators provide clear inspection signals and vivid color representations of different spark states for immediate diagnosis. Convenient to use: no special tools or experience required, saving time and effort. Compact, portable design for use in the garage, shop, or on the go. Key attributes Function: spark plug tester for ignition system diagnostics. Compatibility: suitable for most common spark plugs and ignition systems. Material: high-quality rubber housing with wear-resistant construction. Performance: reliable operation across broad temperature ranges with quick, clear LED feedback. Use scenarios In a home garage, run routine ignition diagnostics on a car to verify spark plug health during service. For motorcycles, ATVs, or lawn equipment, perform on-site checks of spark performance and misfire symptoms. In a professional workshop or roadside service, quickly verify spark conditions to speed up troubleshooting and repair decisions.