Yes there are some right Muppets when installing bells
Then customers become Muppets aswell when they want it high like the Muppet neighbours
External bell boxes mostly ignored when they gain access from rear and no internal sounder fitted ......
Replace cover while your at it if it doesn't clean up well , but as swb says , battery cheap to replace
Chop that bad boy out and put a new battery in if your capable
So why E aton show ha online
I don't really know lol I was looking at stuff like
https://www.eaton.com/us/en-us/catalog/wiring-devices-and-connectivity/home-automation-hub.html
But I suppose you mean something else
Now I confused how you got two wireless expanders on a 9651.....
Better wait for mr DD
Either way if you have spare wireless channels then you can get a radio contact for the door aswell
I.assumingnyou actually have a 9571/2