Ignition Coil Diagnostic Tester Auto Ignition System Detection Pen Coil On Plug MST-101 Test Pen Quick Check Circuit Tester MST-101 test pen car ignition coil tester car automatic ignition system detection pen coil plug quick check circuit tool Product Name: MST-101 fault test pen Type: car fault detector Detection system: fault detection Power supply voltage: 7 (V) Working temperature: 20-50 (?C) MST-101 Automotive Oil Tester Features: The device uses advanced German technology no need to touch the circuit the sensor can collect and analyze the signal the diagnosis results can be displayed by LED lights and buzzer. It is easy to check if the car's electronic components are faulty. Automotive oil tester test range: Coils (conventional coils double spark coils Dingle spark coils) generators internal fan motors combination valves (heating water cooling) emission control valves fuel injectors spark plugs Hall sensors relays. Automotive Oil Tester Place the probe on the electronic component for testing. If it works normally there will be a corresponding voice signal and LED flashing to show the park. Different wires can be tested on top of the detector with different sensitivities on both sides. Secure the probe to the coil for accurate test results. There is a mode switch on the probe. Level II for normal testing and level III for strong magnetic field testing Powered by 2 * AAA battery (not included) note: 1. Please allow 1-5MM error due to manual measurement. 2. The difference between the light and the screen the color of the project may be slightly different from the picture. Package Included: 1 ? MST-101 fault test pen