Precise and reliable spark plug testing for automotive, lawnmower, and engines from small to large, ensuring the plugs are functioning properly. Durable build and easy to use: constructed with high-quality materials for rugged reliability; simple to operate, suitable for beginners; supports testing of all spark plug types. Quick diagnostics for engine health: rapidly identify faulty spark plugs or ignition issues that could affect performance, reducing downtime and helping maintain optimal engine function. Compact and portable: lightweight, space-saving design that is convenient for mechanics and enthusiasts to use at home, in the shop, or on the go. Use scenarios: - At-home maintenance for your car or lawnmower to verify spark plug condition before service. - In-shop diagnostics for technicians to quickly assess multiple engines during repairs. - On-site field checks for small equipment fleets to confirm ignition health during service calls.