Spark Plug Tester with Dual Testing Hole

FEATURES DUAL-HOLE SIMULTANEOUS TESTING: Allows simultaneous testing of two spark plugs, enabling quick comparison and diagnosis of ignition issues in multiple cylinders. ADJUSTABLE WORKING FREQUENCY: The adjustable frequency range (up to 6000 RPM) accommodates different engine types and conditions, ensuring accurate testing across various vehicles. PROTECTIVE COVER DESIGN: Features a robust protective cover that shields users from potential sparks and debris during testing, enhancing safety and reliability. DURABLE CONSTRUCTION: Constructed from high-quality plastic and metal components, ensuring durability and longevity even under rigorous use in professional automotive environments. OPERATION STEPS SPECIFICATION Powe Supply:100-240V Dimensions:As shown below Weight:354g Analog Speed:0-6000rpm Package Includes:1*Spark plug tester, 1*Instruction manual, 1*Charger NOTES Always ensure the engine is turned off before using the spark plug tester. Follow manufacturer's safety instruct