I am looking for pointers to unbiased reviews of medical emergency alarms.
I don't know the generic name for this category of device (otherwise I
would better be able to Google for answers myself :-). I am looking
for a service where if someone is living alone, and falls, and they can 
push a button on a bracelet or necklace to alert someone that they need 
help. There seems to be a wide range of prices and qualities of service
and sales practices, and I am looking for somewhere that compares them
in an unbiased way.

Thank you.