Under normal circumstances, the vehicle electronic tag will be installed on the front windshield of the owner. As long as the vehicle is driving in the etc lane of the toll station, it will communicate with the microwave antenna in a short distance. This is a processing method of background settlement with the bank by using computer internet technology, so that when the vehicle passes through the toll station, it can pay a certain road and bridge fee without stopping. Generally, it is very convenient for everyone to install this etc express easy card, saving time and effort.