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First Alert 3120B 120VAC Hardwired Photoelectric and Ionization Smoke Alarm with Battery Backup | First Alert
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FIRST ALERT Hardwired Wireless Smoke Alarm with Photoelectric Sensor and Battery Backup, SA521CN-3ST , White - Smoke Detectors - Amazon.com
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Amazon.com: Customer reviews: FIRST ALERT Hardwired Wireless Smoke Alarm with Photoelectric Sensor and Battery Backup, SA521CN-3ST , White
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