First Alert 3120B Smoke Alarm, Photoelectric Sensor, 85 dB, White Battery Chargers Jelly roll design

Jelly roll design

For wood doors 8W x 7H

Superior adhesion for an enduring finish

picking up household dirt

Shake until butter separates from buttermilk

First Alert 3120B Smoke Alarm, Photoelectric Sensor, 85 dB, White Battery Chargers Jelly roll designHighlights: 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