Title: Worked well enough for two years but then...
Review: This served me well for two years. It transmitted the info through bricks, glass and metal over a distance of 50 feet for about two years until the batteries needed replacement in the exterior unit. After that problems mounted, performance became spotty and I finally threw it away after three and a half years. Never did like having to unscrew four tiny screws just to change the batteries in the outside unit. This by itself is poor design. Not worth price and frustration for just two years of good service.
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