| First Alert Onelink smoke alarms link the alarms throughout your home. 120VAC hardwired wireless detectors with battery backup integrate single alarms into a system. Expand protection by replacing one existing hardwired alarm with Onelink and linking to existing hardwired and battery operated alarms. By adding Onelink battery powered alarms elsewhere, when one alarm sounds, all alarms will be notified. Easily link alarms with the press of a button. Photoelectric smoke sensor reduces nuisance alarms. Easy access battery drawer: no need to remove an alarm from the ceiling to change battery. Includes 10-year limited warranty. Meets UL standards.
This is the perfect smoke alarm for you if:
 you want to build a safety network of integrated detectors in your home without the cost and hassle of wiring  you want hard wired alarms wired directly into your home's electrical system  you want the added safety of a battery backup  you want battery operated photoelectric sensor smoke detectors to reduce nuisance alarms  you want to mute unwanted alarms with the press of a button  you want battery operated reliability that protects your family and the environment
Place one smoke alarm in each bedroom, and at least one on every level of the home.
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