Would this be saleable in USA

I don`t know what it`s like in the USA, but over here in the UK there seems to be a disturbing increase in assaults on the elderly, some are
just too trusting and open their doors to anyone.

My friend`s father is about to go into production with a motion activated door security chain, as
you approach the door a voice says "Warning!
Check caller`s identity, check identity!". Also
if the door has been opened, when closed a voice
says "Please replace the security chain".

There is a definate "need" for this product, but
I have slight reservations because most elderly
people I know seem very set in their ways, my own
parents being a perfect example :o)

Anyway, does the board think there is a market
for this product in the USA (or other countries),
and if so who might be interested in the distribution?

Thanks for your time

Roger