A new friend of mine who happens to be very knowledgeable told me there are many doorbell alerters and other alerters that are on the market.I am glad things like this are out there for us.
THIS IS ALWAYS GOOD TO HAVE ESPECIALLY IN CASE OF EMERGENCY'S!!!!
Here are just a few options for you.
1- TELTEX- Teltex gives a big discount to HLAA ( Hearing Loss Association of America members). This Item is a Wireless Doorbell Transmitter and Reciever.
2- SILENT CALL alerts to telephone, doorbell, carbon monoxide - and has fire alarm alert as well.
3- HOME DEPOT also has many alerters for us as well here is a Wireless Plug In Strobe for Doors with a flashing Light.
By Clicking on the Link it will take you directly to the websites!
Hope this helps.