I've been researching doorbell signalers the past couple of days because you absolutely cannot hear the doorbell when we are in the basement. I ran across this: (Gee, I'd like to put a URL here, but the system won't let me. Anyway, if you google for Sonic Alert, it's the first match. Then go to Products and then Doorbell Signalers.) And was wondering if anyone had heard anything about Sonic Alert or even better had any experience with them.