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Title: Didn't work
Review: The grip on the bottom of this didn't grip on my tile floor at all - when the door opened -- the alarm just slid out of the way. I tried it on carpet, and linoleum and the same thing happened. It just slides away. The alarm did work when I pushed the two pieces together. It is loud -- just don't know how you would keep it in place when the door opens so it can do its job.
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