Protect your family unfailingly from carbon monoxide hazards with the First Alert® electrochemical detector. The unit utilizes an ultra-reliable electrochemical sensor that alerts with precision increased levels of carbon monoxide in your home. The plug-in unit is equipped with battery backup to ensure operation during a power failure as well as a backlit digital display that keeps in memory peak CO levels. The detector also comports a low battery warning, a single test-silence button and an end-of-life signal. This product is backed by a 7-year limited warranty.
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