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Title: Don't do it!
Review: This works intermittently. You have to have a clear line of sight between the outside and inside device. If you get anything metal in between it seems to stop working. Even when it does work, the alarm is so quiet you can't hear it. It says you can connect a doorbell to it, but Radio Shack couldn't figure out how to do so and no one answers their tech support line at Chamberlain. Overall, I wish I hadn't. I think I have had it too long to return now, playing with it trying to get it to work. THUMBS DOWN!
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