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Review title: Unsure on reliability of this product
Product review: These were installed and wired in "new construction" over two years ago. Since I have been plagued with frequent beeping indicating battery need changing. Changed battery and item continued to beep. I have replace three of the five units in my home. Replacing the item has worked. If this happens once more I will have all smoke/carbon monoxide detectors removed and replaced "with another brand".....
