Feature 1Handheld Coil On Plug fast ignition tester, battery powered, with stable and professional performance. 2Designed to easily and quickly determine whether the COP produces the proper spark for the plug. 3It works by receiving the signal from the secondary ignition coil, and the test result is accurate and reliable. 4Once the signal is received, the tester will determine whether the COP produces the correct amount of voltage and arc duration. 5If the voltage is correct, the tester will beep and the red LED indicator will flash; if the arc duration is correct, the green LED will also flash.Item Type: Ignition Coil Tester Material: ABSBattery: CR2032 button battery, 120mAh (built-in)How to Use:1. Correctly connect the connector and sensor head to the tester2. The induction head is aligned with the ignition coil to start working, and the working status of the ignition coil is judged according to the result of lightingTest Results:Red LED LightConsistent, steady flashing and beeping indicates the COP is producing the correct amount of voltage.No response or an inconsistent response indicates the COP is NOT producing the correct amount of voltage. This may be caused by one of the following:1.Fouled spark plug, or incorrect gaps2.Damaged/corroded wires or connectors3.Faulty coil or PCMGreen LED lightConsistent and steady flashing indicates the duration of the arc is correct.No response or an inconsistent response indicates the duration of the arc is NOT correct. This may be caused by one of the following:1.Shorted windings inside the coil2. Resistance or bad connections in the3. primary / secondary connections4. Faulty coil .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Ignition Coil Tester1 x Adapter Lever1 x Sensor1 x Manual1 x Storage Bag