Adjustable double hole car spark plug tester detector Ignition Plug Analyzer Diagnostic Tool. Turn the key switch 4 clockwise to turn on tester, indicator 3 will light up, tester is now working at 1000rpm/min.

Accessories: 1pc x Spark plug tester 1pc x Power Adapter
Brand: OBDResource
Model: ST100
Type: Spark Plug Tester
Vehicle Type: Passenger Vehicle
Volt: 12 Volt
Warranty: Lifetime