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FIRST ALERT SA521CN-3ST Smoke Alarm, Photoelectric Sensor
- Hardwired alarm can communicate wirelessly with other compatible alarms to create a fire alarm system
- When one alarm is triggered, all connected alarms will sound
- Integrated battery backup allows continuous detection during power outages
- Photoelectric sensor detects smoke while minimizing false alarms
- One button silences a false alarm and tests the smoke detector
- Two AA battery backup
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Choose a store to see Inventory
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