Clear ignition test visibility brightness bulbs and a transparent observation window make it easy to observe test results at a glance. Simple, purposebuilt operation Use: When the engine starts or runs, place the end of the test pen on the voltage line. The luminous tube indicates the ignition performance for quick assessment. Cable and portable Lightweight, handheld, and designed to be carried and used without any cables. An essential tool for automotive inspection and maintenance. Grooved contact end for accuracy The end with grooves increases the contact area with the wire and instrument, delivering more accurate test results. Practical use scenarios Startup ignition check: During engine start, verify spark quality and ignition timing indicators. Running engine monitoring: While the engine is idling or running, confirm consistent ignition performance across cylinders. Onsite electrical diagnostics: Field inspections of ignition wiring and voltage lines in automotive systems. Key attributes Function: Visual ignition performance indicator using a luminous tube. Compatibility: Suitable for automotive ignition systems with voltage lines. Size: Compact, portable, handheld design for onvehicle use. Material: Construction details not specified; designed for handheld operation. Performance: Delivers immediate, easytoread feedback with bright illumination and a clear observation window.