First Alert Wireless Interconnect Hardwired Smoke Alarm

"The First Alert SA521CN-3ST (Model SA520B) Wireless Interconnect Integrated Smoke Alarm links the alarms throughout your home. This 120VAC hardwired wireless detector with battery backup integrates single alarms into a system. By adding Wireless Interconnect battery powered alarms elsewhere, when one alarm sounds, all alarms will be notified. Easily link alarms with the press of a button. The RF Interconnect technology continues to provide a reliable and secure radio frequency communication between Wireless Interconnect alarms. This technology features 915 MHz frequency with 65,000 security codes, and three (3) channel frequency hopping. The unit is compatible with an assortment of First Alert wireless alarms, which includes the SA501CN-3ST (SA501B), SA501CN2-3ST (SA501B2), SA511B, SA511CN2-3ST, SA520B, SA521CN-3ST, CO511B. SCO501CN-3ST (SCO500B), SCO501CN2-3ST. Photoelectric smoke sensor reduces nuisance alarms. Easy access battery drawer: no need to remove an alarm from the ceiling

First Alert Wireless Interconnect Hardwired Smoke Alarm The latest advancement in a series celebrated for its intuitive use of technology, the First Alert Wireless Interconnect collection offers an abundance of options when it comes to creating the ideal safety network. To expand protection to include both existing and hardwired alarms and new wireless alarms, simply replace one existing hardwired alarm with a Wireless Interconnect alarm, and then add First Alert Wireless Interconnect alarms elsewhere. Should one Wireless Interconnect alarm sound off, the remainder of your Wireless Interconnect alarms will also trigger simultaneously and alert you and your home to any potential dangers. This feature allows for the maximum in whole home protection. The realization of Photoelectric Smoke Sensing Technology will effectively reduce the number of nuisance alarms triggered by cooking smoke and shower steam. This alarm comes equipped with a Mute Button that serves the dual purpose of quickly silencing your alarm as well as testing its function. First Alert Wireless Interconnect Battery Operated Smoke Alarms also come equipped with an EZ access battery door that removes the hassle and burden of collecting your alarm from the ceiling and replacing its batteries. The combination of an optional theft-prevention lock and an increased emphasis on the unit's 85db sound output establish peace of mind, while the inclusion of an anti-theft prevention lock all but guarantees the safest of experiences. This alarm comes with a 10-year limited warranty and meets UL Standards. This Wireless Interconnect alarm is for you if: You want to build a safety network of interconnected alarms in your home without the cost and hassle of wiring. You want to your existing hardwired alarms to communicate with new First Alert Wireless Interconnect alarms to expand protection. Where To Place Smoke Alarms: One on every level of the home and one in each sleeping area This product is intended for non-professional do it yourself installation. If you would like information about a professionally installed and monitored system, please contact First Alert Professional at 1-800-921-6025. First Alert Professional is not affiliated with BRK Brands, Inc.