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Title: Cheap insurance but doesn't seem to like the cold
Review: A very simple product. Easy to install, good directions, stick-um on the door unit is high quality, and easy to use. However, proper operation has been erratic when the outside temp is below 5 deg F or so (garage is heated to 40F). Replaced battery then it warmed up. It didn't work well for a few days but now has worked as advertised for three weeks, hasn't been below 20F. All in all it's cheap insurance with little substitute.
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