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Title: Worked Great for 2 days - now it is useless.
Review: I'm very disappointed because I bought this and it worked wonderfully for two days. It was perfect and I was excited to have it. I had one unit on the second floor and the other on the first floor and they had no trouble communicating. Two days later that all changed. Now the two units only function when they are within three feet of each other with nothing in between them. This means that they are both still working, but for some reason the power has been drastically diminished to the point that they are completely useless.
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