Dual Hole Spark Plug Tester for Automotive Diagnostics

General Description: The car spark plug tester detector is an essential tool for diagnosing the condition of spark plugs. It allows you to distinguish between good and faulty spark plugs by evaluating the strength of the spark they generate. This device is designed to work with 10 mm spark plugs and is equipped with two test holes for easy comparison between spark plugs. Technical Specifications Power Adapter: US Plug Input: 100-240V AC Output: 12V 1A DC Item Size: 145 * 85 * 40 mm / 5.71 * 3.35 * 1.57 in Package Size: 200 * 100 * 70 mm / 7.87 * 3.94 * 2.76 in Package Weight: 350 g / 12.35 oz Usage To use the spark plug tester: Place the spark plug in hole 1 or 2 of the tester. To compare a new spark plug with an old one, place the new one in hole 1 and the old one in hole 2. Connect the device to the power supply. Turn the key switch clockwise to turn on the tester; the indicator light will illuminate, indicating that the tester is operating at 1000 RPM. You can adjust the operating frequency between 1000 rpm and 5000 rpm; note that the higher the frequency, the weaker the spark. Other information: Please turn off the power before installing the spark plug. Do not touch the spark plug with your hand during operation to avoid any danger. Package list: 1 * Spark plug tester, 1 * Power adapter.