In article 75c30252-1d22-4206-8cc3-e4b17c9cb470
@googlegroups.com, says...

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


Make your own!

I did it when I was about 9 by just folowing some simple
instructions - try the local junior library (if they have
any 'proper' books anymore).

We used mine as our doorbell for many years.

--

Terry