Average Reviews:
(More customer reviews)After 9-12 months use it started beeping and displayed "err". There's no explanation of what to do. Not worth pursuing---just threw it away---I would stay away from this product.
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Maximum Protection plus Ultimate Convenience Carbon Monoxide Alarm FCD4 Plug-in with battery backup. Works during power outages. Remote control Silence/ Test. Uses most household remote control devices to silence or test alarm. Digital Display. Stores, recalls, and displays highest level of carbon monoxide detected. Low battery silence. Quiets low battery alert without affecting alarm operation. Covers only one wall outlet. Additional Features: Loud 85-decibel alarm Low battery warning 9V battery included UL Listed 5 year limited warranty
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