Dear Customer, If You Are Not Satisfied With The Package, Please Contact Us As Soon As Possible, We Will Give You A Satisfactory Answer. Please Dont Use The Complaint Function At Will. If You Dont Use The Complaint Function, You Can Also Handle It Perfectly.have A Good Day.100% new and high qualityThe team adopts German advanced technology, without the need to touch the circuit, the sensor can collect and analyze the signal, and the diagnosis result can be displayed with the LED and the buzzer. It is easy to check if the electronic car equipment is defective.Test range of the automobile oil detector: coil (conventional coil, double coil, dingle spark coil), generator, internal fan engine, combined valve (heating, water cooling) emission control valve, fuel injector, spark plug, hall sensor, relayDescription of the car oil tester: Place the probe in the electronic component for the test. If it works normally, there will be a corresponding voice signal and a flashing LED to show the space ofParking. Different cables can be tested at the top of the detector, with different sensibilities on both sides. Connect the probe to the coil to obtainprecise test results. The normal test is level two and the strong magnetic field test is level three. Fed by 2 AAA batteries (not included).Package includes:1 Failure Test PenSpecification:Material: ABSSize: approx. 15x2cm/5.90x0.79 inPower supply voltage: 7 (V)Working temperature: 20minus50 (C)