First Alert SA521CN-3ST Wireless Interconnect Hardwired Smoke Alarm

Wirelessly interconnect your smoke alarms so they communicate with each other, 120VAC hardwired wireless interconnect smoke alarm with battery backup.

First Alert SA521CN-3ST Wireless Interconnect Hardwired Smoke Alarm

BRK First Alert - SA521CN-3ST Interconnected Hardwire Wireless

The First Alert SA521CN-3ST Interconnected Smoke Alarm allows owners to create an interconnected fire alarm system without the cost and hassle of wiring. Use this smoke detector to replace an existing hardwired smoke alarm and then install additional First Alert Wireless alarms for an interconnected safety network additional alarms sold separately. This hardwired smoke detector can connect and communicate with up to 18 compatible alarms so when one alarm is triggered the entire system reacts.

First Alert 1039830 Wireless Smoke Alarm

First Alert SA521CN-3ST Onelink Integrated Wireless Smoke Alarms

First Alert SA521CN-3ST Onelink Wireless Hardwired Smoke Alarm

The First Alert SA521CN-3ST Interconnected Smoke Alarm allows owners to create an interconnected fire alarm system without the cost and hassle of wiring. Use this smoke detector to replace an existing hardwired smoke alarm and then install additional First Alert Wireless alarms for an interconnected safety network additional alarms sold separately. This hardwired smoke detector can connect and communicate with up to 18 compatible alarms so when one alarm is triggered the entire system reacts.

First Alert 1039830 Wireless Smoke Alarm

First Alert Z-Wave Smoke Detector & Carbon Monoxide Works with

First Alert SA501CN-3ST Wireless Interconnect Battery Operated

First Alert Wireless Interconnect Hardwired Smoke Alarm - (SA521CN

BRK First Alert - SA521CN-3ST Interconnected Hardwire Wireless

FIRST ALERT BRK SC7010B-3 Hardwired Smoke and Carbon Monoxide (CO

First Alert Wireless Interconnect Hardwired Smoke Alarm (SA521CN