Feature:Performance: Car spark plug tester detector with two holes to test the spark plug.Function: The tester is used to test the spark plug and provides the right adjustment for the car. With dual hole, the tester can test and compare the two spark plugs. It can test spark plug performance and ignition strength.Wide Application: It can suit most cars. 12V Gasoline vehicles car spark plugs.Specification:Type: SPT101 Spark plug testerModel：12V Gasoline Car spark plug testerColor: Black, YellowMaterial: Plastic, MetalVolt：12 VoltAnalog speed：0-6000rpmInput: 100-240V ACSize: 145x85x110mm/5.71"x3.35"x4.33"(L*W*H)Power Supply: 110V/220VPower Adapter: Output DC 12V 1AUsage: Test car spark plug performance and ignition intensityInstallation:Place the spark plug into the tester socket.