Features: 1. [Dual Hole Testing & Time Saving]: The ANCEL Car Spark Plug Tester supports dual-hole simultaneous testing and analog engine operation, providing improved efficiency and time savings. 2. [0 to 6000rpm Operating Frequency]: The ANCEL Car Spark Plug Tester features an adjustable working frequency range from 0 to 6000rpm, which can be adjusted as needed. 3. [Wide Application]: Compatible with 12V gasoline vehicle spark plugs and designed for input voltage of 100V-240V. 4. [Easy Operation Plug and Play]: Simple to use, plug and play design. Includes an indicator light for intuitive display of spark plug status. Specification: * Model: Spark plug tester * Input: 100~240V AC * External cable length: 1m * Host size: 145*90*114mm * Power supply: Power adapter * Power adapter: Output 12V 1A DC * Suitable for 12V gasoline vehicle spark plugs * Usage: Test car spark plug performance and ignition intensity Package included: 1 x ANCEL Car Spark Plug Tester main unit 1 x Packing box 1 x User manual 1 x EU Plug Adapter Connector