First Alert Wireless Interconnect Hardwired Smoke Alarm - SA521CN-3ST (1039830)

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

FIRST ALERT Hardwired Wireless Smoke Alarm with Photoelectric Sensor and Battery Backup, SA521CN-3ST , White - Smoke Detectors

FIRST ALERT Hardwired Wireless Smoke Alarm with Photoelectric Sensor and Battery Backup, SA521CN-3ST , White - Smoke Detectors

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