The First Alert 0827B Sealed Ionization Smoke Alarm features a 10-year sealed lithium battery， eliminating the need for battery replacements during the lifetime of the alarm. A tamperproof design prevents batteries from being removed. Featuring an ionization sensor for reliable smoke detection， this model meets code for all sealed/tamperproof alarms. The smoke alarm includes a mute feature that lets users to silence the alarm， as well as a power LED and alarm indicator， end of life signal， and single test button for simple operation. A Perfect Mount system allows you to easily align and mount the smoke detector on the wall.Find the SMK ALRM 10YR SEAL 0827B at Ace.
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