High-quality material and durability Made from premium rubber, this spark plug tester withstands a wide temperature range and is built for long service life in automotive environments. Clear problem identification Diagnose ignition issues quickly. Clear feedback helps you identify spark conditions to guide fast and accurate repairs. Advanced diagnostic visuals Intelligent light indicators, transparent inspection signals, and color-coded spark status visualization make it easy to spot faults and understand engine condition at a glance. Easy to use No specialized tools or expertise required. Simple operation helps you save time and reduce effort during maintenance and troubleshooting. Use scenarios - Diagnosing misfires in a car engine: quickly determine which cylinder or ignition component is causing the issue. - Troubleshooting lawn equipment and small gasoline engines: verify spark quality to prevent starting and running problems. - Quick checks on motorcycles or power generators: assess spark condition during routine service to maintain performance.