| Brand | Unbranded |
|---|---|
| Volt | 12 Volt |
Check the listing for details. For Car 12V Spark Plug Tester Dual Hole Diagnostic Ignition Coil Analyzer Tool. Condition: New. Listed at 44.99 USD. 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. Turn the key switch 4 clockwise to turn on tester, indicator 3 will light up, tester is now working at 1000rpm/min.