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 * Length of external: 1m* 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 intensityPackage included:1* ANCEL Car Spark Plug Tester main unit1* Packing box1* User manual1* EU Plug Adapter Connector