Review on 🔥 JND Premium Ignition Spark Tester: The Fool-Proof Engine Diagnostic Tool by Michael Colley

Well I got this to test my small engines. I ignored the negative reviews hoping to get a better version. Well I haven't. The rubber boot does not snap onto the spark plug and the cap holding the device has ripped off. I cut a piece of the rubber boot to snap onto the spark plug and stuck the dipstick into the cap of the unit. I glued the screw cap onto the tester to secure it. After all that, it doesn't even work. Why can't we give negative stars? I have tried. It just doesn't work. Thank god Revain gave me my money back.