Smoke Detector, Hardwired Interconnected Smoke Detectors, Smoke Alarm with Replaceable 9V Battery, Interconnects Up to 12 Fire Alarms Smoke Detectors, Photoelectric Fire Alarm with Test/Silence Button - - Amazon.com
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Fibaro Smoke Sensor 2 FGSD-002 ZW5
Smoke Sensor - flame and smoke detector | FIBARO
Smoke Sensor - flame and smoke detector | FIBARO
SITERLINK Mini Smoke Detector Fire Alarm, Small 10 Year Battery Photoelectric Smoke Alarm, Fire Detector with Test & Silence Button for Home, UL Listed, GS521C-A, 4 Pack - - Amazon.com