Title: BUY A DIFFERENT MODEL!
Review: We had a Sears door monitor for over 10 years and it eventually failed. Replaced the Sears unit with this one from Chamberlain. It's lasted no more than 2 years. Like other reviews, my unit started to flash the red and green lights together, Unplugging the unit and replacing the batteries did not resolve the issue...The theory behind the door monitor is great and my family highly depends on the signal to ensure the door has been closed. I will definately purchase another door monitor, just not this model from Chamberlain.
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