Features: 1. [ Dual Hole Testing& Time Saving]: The ANCEL Car Spark Plug Tester is able to dual-hole simultaneous testing as well as analog engine working, which is much more efficient and time-saving. 2. [0 to 6000rpm Operating Frequency]: The ANCEL Car Spark Plug Tester is designed with adjustable working frequency, the range can reach 0 to 6000rpm. Can be adjusted as you required. 3. [Widely Application]: 12V Gasoline vehicles car spark plugs, 100V-240V input voltage . 4. [Easy operation Plug And Play]: Easy operation, plug and play. Come with indicator light, the status of the spark plug can be displayed more intuitively. Specification: * Mold:spark plug tester * Input: 100~240V AC * Host size: 145*90*114mm * power supply: Power Adapter * Power Adapter: Output 12V 1A DC * Suitable for 12V driven gasoline car spark plugs * Usage: Test car spark plug performance and ignition intensity Package included: 1* ANCEL Car Spark Plug Tester main unit 1* Packing box 1* User manual 1* US Plug Power supply connector