Simple to use - just remove rubber boot from spark plug, insert tester & place tester boot on plug. Must-have diagnostic tool for any engine with a spark plug. Turn the engine over - if ignition is being sent to the cylinder, light in tester glows.

Brand: Unbranded
Type: Spark Plug Tester
Warranty: 30 DAYS
Fitment Type: Direct Replacement
Color: Black
Package includes: 1pc x Spark plug tester;1pc x Power Adapter
Fit for: 12V Gasoline vehicles car spark plugs
Functions: Test spark plug performance and ignition strength
Placement on Vehicle: Left