1. Application: car ignition test 2. Size: about 12.2 cm in length 3. Weight: about 27 grams 4. Features: high brightness of the bulb, easy to observe and use, pen clip design, easy to carry, groove type test design, grooved end makes the contact area between the lead and the instrument larger, and the test is more accurate 5. How to use: when the engine is started, place the grooved end of the instrument on the spark plug wire. If the light bulb flashes, it means that the spark plug wire is transmitting a spark signal
