Car spark plug tester

High Voltage Spark Plug Tester

Warning:
The device generates up to 1000V during operation. Please close the protective cover before starting the test to ensure safety.

How to Use:

1. Insert the spark plug into socket 1 or 2.
2. Close the protective cover securely.
3. Connect the adapter to the side port, then connect the device to the power source.
4. Turn switch (6) clockwise to power on the device; indicator (5) will light up green.
5. Continue turning switch (6) to adjust the frequency between 1000 RPM and 6000 RPM.
6. The higher the frequency, the stronger the spark.