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.

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

First Alert Store: Buy Smoke Alarms, Carbon Monoxide Detectors, & Home Safety Products

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First Alert SA521CN-3ST Wireless Interconnect Hardwired Smoke Alarm

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First Alert SA521CN-3ST Wireless Interconnect Hardwired Smoke Alarm