Check Sparks innovative technology with LED micro-circuit design, Check spark is a highly accurate diagnostic sensor that accurately detects why your car, truck, boat, ATV or any gas powered tool won't start.
Simple Safe Operation
Clip and Crank: self attaching clip and innovative spark memory circuit make checkspark easy to use by just one person,
Auto On: Simply clip the checkspark tester on the spark plug wire and briefly crank engine.
Auto Off: Remove checkspark from the plug wire automatically turns the tester off
Auto-Lock Circuit: After engine turnover, one of three diagnostic LEDs stay lit to accurately detect condition of the ignition system.