To answer the question, "where is the best place to install the ETC device?", the following is a more detailed and optimized version of the article:

The ETC device is usually installed in the middle to upper part of the front windscreen for small cars, and in the middle to lower part for large trucks and buses. The recommended height is not less than 1.2 meters and not higher than 2.5 meters, and the angle of installation should be between 30 and 90 degrees. When the vehicle has a防爆膜 or is laterally fitted with防爆膜, it may affect the signal transmission of the micro-wave communication link, so it should be installed in the micro-wave window area.

ETC is an abbreviation for Electronic Toll Collection, which refers to an electronic payment system. When you apply for an ETC account, you will need to provide your valid ID and copy of your vehicle's license. For non-owners, you will also need to bring your agent's ID. The copy of your license should be a page that has the most recent seal of the inspection, which is needed to pay for the high-speed road tolls. The ETC account can only be used by people between the ages of 18 and 60.

Here are some important tips for installing the ETC device:

1. Install it in a location that does not obstruct the view: Many cars have a large rearview mirror that can cause a small blind spot for the driver. Therefore, it is recommended to install the ETC device behind the rearview mirror on the right side to avoid blocking the driver's view.

2. Avoid affecting the charging: ETC electronic tags require electricity, but they usually do not need to be charged or replaced with batteries because they have a solar battery panel on the back that can charge itself. When installing, avoid placing it on the black areas of the windscreen or in a place where the solar battery is easily blocked.

3. Do not remove it easily: The middle button on the back of the ETC device is a lock button. After installing the device, the windscreen will press the lock button, and if it is removed, the lock will pop out and the ETC device will be locked, making it impossible to use. This is to prevent multiple vehicles from using the same device.

When using ETC, you should also keep in mind the following:

1. The transaction area of ETC is 8 meters. To prevent the ETC device of the car in front from malfunctioning, maintain a distance of at least 10 meters from your vehicle.

2. The speed limit for recognition of the ETC system is 20 kilometers per hour. If your speed is too fast, it may cause the ETC device to fail to read your vehicle information and result in a failed transaction.

3. If you use a debit card to bind with the ETC, make sure that the balance is sufficient, otherwise the transaction may fail.