What is the electronic tag of ETC?

[McKevin]

ETC electronic tag refers to the OBU device, which is commonly known as the ETC device. The OBU device is mostly installed on the windshield of motor vehicles and communicates with the roadside unit (RSU) at highway toll stations via microwave heating. When the vehicle approaches the gear lever, the RSU detects the signal from the OBU and automatically opens the gear lever, achieving the effect of automatic control system driving. ETC installation process: Upon receiving the device, first check whether the ETC card and the electronic tag (OBU) are damaged. Press the anti-tamper button on the back of the OBU, and the red light will briefly light up. The OLED screen will display "Tag Invalid" and "Please Insert Card," indicating the device is functioning normally. Clean the front windshield to ensure the glass surface is smooth, clean, and dry. Then peel off the protective film on the back of the OBU and stick it to the installation position. Press it with your hand for 2-3 minutes to remove any air bubbles. Insert the ETC card with the front side facing the driver and the back side facing the front glass, ensuring the chip is inserted into the OBU device.