ITEM NAME:Great Performance Auto Spark Plug Tester Ignition 12V In-Line Spark Tester Description: Function: A must have diagnostic tool for any engine with a spark plug, can quickly and easily diagnose whether the car ignition system is working properly. Avoid fire, the ignition coil burned out and so on. Easy to Test: According to spark color and flash over distance to determine the quality of the coil; The normal spark distance is 1cm, and the spark shape is straight with violet blue color. Safe In Use: Alligator clip securely fastens to ground, designed to prevent high energy sparks arching directly to any ground. Adjustable: Simply connect the tester between the spark plug and the plug wire, screw assembly adjusts spark gap quickly and easily. Widely Application: Suitable for all internal & external combustion engines, cars, trucks, motorcycles, lawnmowers, chainsaws, trimmers, snow-blowers, generators etc. Specification: Application: all cars spark plug and ignition system Function: to test whether the car ignition system is working properly Color: transparent + black Material: ABS plastic + metal Length: about 14cm Operating temperature: -50-80 (℃) Adjustment range: 0-2.5CM Power supply voltage: 220-240 (V) Spacing setting: 0.8-1.5 cm Package Includes: 1 Piece Spark teaser 1 Piece Ground lead SKU: DMO0000610652025530.Adjustable: Simply connect the tester between the spark plug and the plug wire, screw assembly adjusts spark gap quickly and easily. Function: A must have diagnostic tool for any engine with a spark plug, can quickly and easily diagnose whether the car ignition system is working properly.