Features: The Car Spark Plug Tester is able to double hole simultaneous testing as well as analogs engine working, which is much more efficient and time-saving. 0 to 6000rpm Operating Frequency: The Car Spark Plug Tester is designed with adjustable working frequency, the ranges can reach 0 to 6000rpm. Can be adjusted as you required. Widely Application: 12V Gasolines vehicles car spark plugs, 100V-240V input voltage . Easy operation Plug And Plays: Easy operation, plug and plays. Come with indicator light, the state of the spark plug can be displayed more intuitively. Drive with confident knowing that your vehicles ignitions system is in excellent condition, thanks to this reliable and user friendly spark plug tester. Specifications: Material:ABS,Metal Power Supply:100-240V Analogs Speed:0-6000rpm Type:US,EU Note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Spark Plug Tester