Rob Graham laid this down on his screen :
New neighbours have put in a request for me to do the same for them, and
their house is significantly larger than mine. But Byron have been bought
over and the SX15 battery wireless door BELL is no longer available.

Anyone know of particularly loud wireless chimes or a wireless bell?

Friedland offer a very good, very reliable wireless chimes system. It
has longer range, 100m outdoors and more than one chimes unit can be
added to it. It is very loud and there are a few tunes to choose from.
Some have a bright flashing light, useful for the deaf or were you want
to be sure it has been triggered. Unlike some, I have never known them
be false triggered.