1. Double 13mm Hole 2. 2A Power Supply 3. Technical Chip 4. 0-6000rpm/min 5. Enhanced Resistance Coil Our Spark Plug Tester compared to others: 1. Dual hole design allows easy comparison between spark plugs for better performance evaluation 2. 2A power supply delivers stronger spark output compared to 1A models which may result in weak or inconsistent sparking 3. Built-in technical chip ensures stable operation and helps prevent ignition failure 4. Upgraded resistance coil produces brighter and more reliable sparks Compatibility for JF109 Double Hole Spark Plug Tester: The JF109 supports testing of spark plugs with diameter up to 13mm, suitable for use with cars, motorcycles, speedboats, motorboats, lawn mowers, and similar engines. Plug Type: EU Plug, compatible with countries including Indonesia, Germany, France, Spain, Italy, and others Voltage: AC 100-240V Color: As shown in images Material: ABS Package Contents: 1 x Spark Plug Tester Main Unit 1 x Power Supply Connector 2 x Gasket Note: The package includes only the items listed above. Other accessories or products are not included. Lighting and display settings may cause slight variations in color between the product image and actual item. Measurement may vary by +/- 1-3cm due to manual measurement.