I bought first one to put by the door in our garage to the house. Solves the problem of not knowing if someone is at the door without hiring an electrician. Recently bought a second one for my parent's home to put in their garage. The wired one they had installed died so to avoid cost of an electrician, bought this. Helps that my father can plug in the 'chimes unit' where he can hear the door bell. May have to get another one to put on their front door! Definitely a good buy.
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