Safe, durable material: Our spark plug tester is built with high-quality rubber material to deliver reliable performance across a broad temperature range and to withstand long-lasting use. Efficient diagnostics: Quickly identify ignition problems and determine spark conditions to guide maintenance and repairs. Clear indicators: Intelligent light indicators provide clear inspection signals with vivid color coding to represent different spark states for immediate understanding. Easy to use: Simply connect and run the engine with the tester in place; no special tools or advanced skills required, saving time and effort. Key attributes: Function — spark plug ignition testing; Material — high-quality rubber; Performance — reliable across temperatures; Compatibility — suitable for standard spark plug checks. Practical applications: Automotive maintenance on gasoline engines; troubleshooting for motorcycles and other gasoline-powered equipment; on-site ignition health checks during routine service to verify spark quality before replacement.