A replacement has assured me straightforward. However, I have currently not received the replacement, assume, however, that it will come in the next few days - has also come!
The function is good enough. I have installed the device in a bus. The display I on the ceiling above the rear window (upside down) mounted. As another customer appeared to me as the most viable solution. Installation simple and absolutely satisfactory visibility through looking at the rear view mirror.
The volume is sufficient - even in a bus. One really does not need a hearing aid.
After prolonged use, I regret to repeatedly detect failures. Sporadic at first, then permanently. Again and again falling from sensors.
