I'm doing some research on what I'm hoping is not a tricky issue.

My parents are both Deaf - Dad profoundly, mum around 70% deaf with hearing aid on. At their home (where I was a baby!) they have a full system rigged into the roof so that they put a microphone into the cot and a light in their room, the lounge and the kitchen will flash. The baby crying bit has been disconnected, but the lights still flash when the phone rings or someone is ringing the doorbell.

The monitor I'm looking for is really only for when they baby sit at my place.

I'm keen to keep it small if possible as we are in an apartment. To be honest, I probably wouldn't buy one for our house unless I needed it for mum and dad.

Has anyone seen something like this? Suggestions on brands would be appreciated.

Cheers,
Fiona