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WebFind many great new & used options and get the best deals for First Alert Digital Display Carbon Monoxide Alarm New In Box Free Shipping at the best online prices at eBay! Free shipping for many products! ... SALE First Alert Dual Power Carbon Monoxide Alarm Plug In Battery Digital NEW. New. $21.99 ... (20-Pack) - New. New (Other) $24.99. Free ... WebSep 14, 2004 · The First Alert CO400 carbon monoxide alarm uses an electrochemical sensor the most accurate technology available. The permanent sensor lasts up to 5 years. It is powered by a 9V replaceable battery giving you peace of mind even during power outages. The test/silence button silences the alarm and allows you to test its functionality. total labor cost equals wage rate plus
First Alert Battery Electrochemical Carbon Monoxide Alarm- 2 Pack ...
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