First Alert 3120B Smoke Alarm, Photoelectric Sensor, 85 dB, White Battery Chargers Plastic corners form a finished

Plastic corners form a finished window screen

Jelly roll design

a hex wrench and carpenter’s glue

It's optimized for extreme adhesion and flexibility

Superior adhesion for an enduring finish

First Alert 3120B Smoke Alarm, Photoelectric Sensor, 85 dB, White Battery Chargers Plastic corners form a finishedHighlights: Color : White Volts : 120 volt Power Type : Hard Wired w Battery Back up Sensor Type : Ionization Photoelectric Battery Size : AA Sound Level : 85 dB Batteries Included Photoelectric and ionization sensors for comprehensive smoke and fire detection Hardwired alarm includes battery backup for power outages Single button to test detector monthly or silence during a false alarm Latching features indicate low battery or originating alarm in a