Double spark plug tester with two 12 mm spark plug sockets

FEATURES Double Hole Tester: Equipped with two spark plug sockets, this tester allows you to test two spark plugs (good and bad) at the same time. By comparing the spark intensities, you can accurately judge the performance and ignition intensity of each spark plug. Protective Cover: Designed with a protective cover to prevent the risk of electric shock during testing and ensure safe operation. Adjustable Working Frequency: The rotary switch allows you to adjust the working frequency in the range of 0~6000 RPM. Higher set frequencies result in stronger spark intensities and provide more accurate testing conditions. Accurate Data: The tester can simulate engine operations and accurately reproduce the car's RPM to provide reliable data. High Quality ABS Material: Made of high quality ABS material, the tester is shock and heat resistant, providing long-term service and reducing costs associated with frequent tool changes. Plug and Play: Easy to use, just connect the adapter and get