Thank you for the hint, I have now read it in the fine print. However, it is interesting that the entire flyer suggests that this is exactly the case. „ekey“ is an Austrian company and is colloquially actually understood as a synonym for the function of fingerprint scanning. That means, I assume, that any fingerprint scanner can be installed in the „ekey“ version and not only the one from the manufacturer „ekey“?
Edit: One reads a lot of bad things about the scanner installed by Doorbird itself in the „50“ version.