http://www.henrys.co.uk/SECURITY/doorphones.html

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Merry Christmas and a Happy New Year
www.rnshipmates.co.uk
"Alan Holmes" wrote in message
...

I think we should be able to ask who is at the door before opening it, I
remember, and that could be a first for me, remembering that is, there
used
to be gadgets you put outside with a speaker and a microphone in, so if
someone rang the bell you could ask who it was before opening the door,
but
I have no idea where one would go for such a gadget.

So, which store do I ask at first?

Alan