Description This item is a car key ECU induction test coil made of high-quality ABS and LED material. As long as the line trap on the ignition switch, turn on to try. LED lights up on the coil it shows normal vehicle. If the lamp is not lit access road that is described ECU computer is not working properly. Features - Color:Red.- Material:ABS, LED.- Size: About5.00X5.00X1.00cm/1.97X1.97X0.39inch.- Voltage: 12V.- Working Temperature: -20-50.- Intelligent operation, it is not connected to the computer.- Small and easy to carry, and powerful and easy to operate.- Without any instrument, convenient test ECU access road cartridge is good or bad.- With this simple detection coil without people professional in high-end equipment can be quickest way to test the operation of the vehicle.- The detector that is set in the ignition lock on with the car to try into the ignition lock or lit instrumentation moment, LED flashes to indicate with chip, and vice versa without.Packing list: 2 x test coils