A wired doorbell gives you one sound, in one hallway, at one volume. That works until you are in a finished basement with the door closed, out in a three-season room, or a couple hundred feet into the yard behind a mower. The standard advice is to pull the button off the siding and mount a video doorbell, which drags in transformer voltage, a chime kit, and usually a subscription.
MakeUseOf
I made my old doorbell smart without replacing it or touching the wiring
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