The power source for my doorbell is attached in the basement. Only the power to the doorbell is exposed. Every other componect of the door bell system is hidden behind the walls on the main floor. My goal would be to put another doorbell ringer downstairs and ring both at the same time. This may sound confusing or weird, but is there a way to tap into the power source, and have it activate the downstairs doorbell, when the it detects a power usage for the upstairs doorbell? My guess is no, but am looking for other ideas from you all. The option of breaking into the wall upstairs is not feasible, I can do w/out the doorbell if that's the case. Txs All.