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Flashing red lights fire alarm system on the ceiling in the room building. Smoke detector fire alarm sensor Stock Photo - Alamy
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DETA 1151 smoke alarm, interconnected. Beeping and light confusion! - Smoke Alarms - Safelincs Fire Safety Forum
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First Alert 10-Year Battery Hardwired Photoelectric Sensor Smoke Detector in the Smoke Detectors department at Lowes.com
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