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.

Brand: ANCEL
Manufacturer Part Number: Ignition Spark Tester
Country/Region of Manufacture: China
Warranty: 3 Year
Fit For: 12V gasoline cars
Volt: 12 Volt
Item Type: Ignition Tester
Model: 12V Gasoline Car spark plug tester
Input voltage: 110V
Product size: 145x85x113mm
Analog speed: 0-6000rpm
Packing size: 165x100x118mm
Type: Spark Plug Tester
Vehicle Type: Passenger Vehicle
Usage: Test car spark plug performance,igniton intensity