Portable and convenient - The compact, lightweight design provides easy transport and storage. Perform tests anytime, anywhere on car spark plugs and small engine spark plugs. Durable performance - Made from durable plastic, this tester withstands regular use and delivers reliable performance over time. Easy to use - To check a spark plug, simply touch the tester to the coil. Its straightforward operation makes it accessible for users of all skill levels. High precision measurement - Accurately detects the spark plug voltage, helping ensure the plug is functioning correctly and efficiently. Use scenarios - Routine car maintenance: quickly verify ignition health and diagnose misfires during service. - Small engine care: test spark plugs on lawn mowers, generators, snow blowers, and other small engines. - Field or shop work: convenient on-site verification of ignition components before inspection or repair.