Car Spark Plug Tester User Manual:
1.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
2.Connect to power supply
3.Turn the key switch 4 clockwise to turn on tester, indicator 3 will light up, tester is now working at1000rpm/min.
4. Again turn the key switch 4 clockwise,you can adjust the working frequency between 1000rpm to 5000rpm/min.The higher the frequency, the stronger the spark strength.
Product Parameters:
Main Unit Size:145*85*60mm
Main Unit Weight:220G( Not including Power Adapter)
Power Adapter: Input 100-240V AC / Output 12V 1A DC