| Accessories | User Manual |
|---|---|
| Brand | OBDMonster |
| Vehicle Type | Passenger Vehicle |
| Volt | 12 Volt |
| Warranty | 1 Year |
Check the listing for details. Car Spark Plug Tester Double Hole 12V Engine Ignition Coil Tester Diagnostic. Condition: New. Listed at 21.99 USD. Why do we need a spark plug tester?. Spark Plug Tester working frequency of car is 0-6000 rpm. The higher the frequency, the stronger the spark intensity. Spark plug tester is very simple. OBDMonste Automotive Spark Plug Tester Function.