Adjustable double hole car spark plug tester detector Ignition Plug Analyzer Diagnostic Tool. Place the Spark Plug into tester hole 1 or 2; If you want to compare the new spark plug and old one, place new spark plug into hole 1 and the old on into hole 2.

Application Range: 12V Gasoline vehicles car spark plugs
Brand: OBDMonster
Input: 100-240V AC
Output: 12V 1A DC
Type: TPMS
Vehicle Type: Passenger Vehicle
Warranty: 6 Month