I love these! We have three sets of french doors on our 1860's house and decided to use these for the top bolts. We put one on each door, so had to buy a total of 6 but they look great.
I've had other plug-in doorbels when ONCE programmed worked fine, although one plug in unit somehow failed so I was left with only one sound unit in the bedroom and not the lving room, too. I like having two recievers in case the bedroom door is closed. The most confusing, (China), are the instructions translated into English. VERY confusing on my first set but you can tell this company spent more time in getting their instructions do-able. I would suggest that once you get the two three items pared that you write it all out in "American" so it's easier to do the next time when changing to Christmas music, etc. Doorbell blue button lights up when pressed to show battery is working (takes a smaller non-AAA battery but I haven't had to replace mine ever yet). My old unit's music sounded much more "tinny" than this one does - doesn't sound like carnival music as much and tone/piano sound much better. Recommend!
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