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: x Mold:spark plug tester x Input: 100-240V AC x Length of external: 1m x Host size: 145x90x114mm x power supply: Power Adapter x Power Adapter: Output 12V 1A DC x Suitable for 12V driven gasoline car spark plugs x Usage: Test car spark plug performance and ignition intensity Package included: 1x ANCEL Car Spark Plug Tester main unit 1x Packing box 1x User manual 1x EU Plug Adapter Connector