OK some more info. :)
@camdensnyder
Yes, I use a mechanical bell (Honeywell Home D117) with the ChimeKit included with the Imou DB61i.
The Imou DB61i is powered by a normal 24V bell transformer.
I bought the Imou DB61i via Aliexpress for €72.
@ludshed
I have around 40 WiFi clients here, not...