This project is a car ignition tester made with scientific design and excellent craftsmanship. It has simple application methods and practical functions, which can effectively help you prevent safety hazards, and clearly and intuitively help you understand the fire coil or high-voltage wire status. Feature - Color: Assorted. - Material: ABS. - Size: About 12.30X1.00X1.00cm/4.83X0.39X0.39in. -Voltage: 6-24V. -Working temperature: 40 degree centigrade. - Test spark plugs, coils, and distributors on breaker point and electronic ignition systems. - Blunt nose tip prevents lead puncturing. High-intensity bulb and viewing window for greater flash concentrating. - Tool tests spark plugs, spark plug wires, and coils without puncturing the wire. - With the engine running, place the grooved end of the tool over the spark plug wire. The bulb will flash to indicate spark. - Easy to carry and use, it's suitable for home application, garage, laboratory. Package list: 2 pens