Can ETC be installed without sticking to the windshield?

[OSteven]

ETC can be used without being attached to the windshield. Installing ETC on the upper part of the windshield is to minimize obstruction of the driver's view while ensuring better recognition by the toll station equipment. If you prefer not to install it on the windshield, place it in an open area where it can still be visible through the windshield. For small cars, the ETC is typically installed in the upper middle part of the front windshield, while for large vehicles like trucks and buses, it is installed in the lower middle part. The suitable installation position should be at a height of no less than 1.2 meters and no more than 2.5 meters, with an installation angle between 30 to 90 degrees. If the vehicle has or will have a sunshade film, which may affect microwave signal transmission, it should be installed in the microwave window area. Here are some considerations for ETC installation: Avoid obstructing the view; installing it behind the rearview mirror is ideal: Many car models have windshields with a steep incline, which can reduce the driver's field of vision. Installing the ETC without considering this may increase blind spots. Placing it behind the rearview mirror on the right side helps avoid blocking the view. Do not interfere with charging: The ETC electronic tag consumes power but generally does not require charging or battery replacement, as it has a built-in solar panel for self-charging. Therefore, avoid installing it on blackened areas of the windshield or positions that may block the solar panel. Once installed, do not remove it arbitrarily: The adhesive center has a tamper-proof rod connected to a switch. After installation, the windshield presses the rod in. If removed, the rod pops out, triggering the switch and locking the tag, requiring a visit to an ETC service point for reactivation. This prevents multiple vehicles from sharing one device. ETC usage tips: The ETC transaction sensing range is 8 meters. To avoid paying for the vehicle ahead due to its faulty ETC device, maintain a distance of at least 10 meters. The ETC lane recognizes vehicles at speeds up to 20 km/h; exceeding this may cause transaction failure. If using a debit card linked to ETC, insufficient balance may also lead to transaction failure.