This is the voicemail doorbell. It asks for voicemail if the person owning the house doesn't come and press a button in 5 minutes. (If you want a different period of time, you can set that on your phone). Then the doorbell sends the voicemail to that person's phone! I got this brilliant idea thinking that it can be my own invention only to find out that someone else has already invented it! Still, I want to share this idea I got with you. Thanks, Calmmongoose
