First, we need to install ETC. We need to buy the equipment to install ETC first, but no matter where we buy it, we will receive a courier card and a sensor similar to BB machine. Now, the driving recorder you buy sometimes includes, etc. If it is convenient for you to buy a driving recorder, you'd better choose one with ETC, as shown in the figure. Before installation, it should be confirmed that there are no other accessories or cracks in the installation position. If you put a metal film on the windshield, it will isolate the signal. Before installing ETC equipment, the metal film must be cut off. Remember not to activate the device before connecting it.