First Alert 3120B Smoke Alarm, Photoelectric Sensor, 85 dB, White Battery Chargers Plate Size: 1-1/2" X 2-1/8"

Plate Size: 1-1/2" X 2-1/8"

For wood doors 8W x 7H

Shake until butter separates from buttermilk

Plastic corners form a finished window screen

It's optimized for extreme adhesion and flexibility

First Alert 3120B Smoke Alarm, Photoelectric Sensor, 85 dB, White Battery Chargers Plate Size: 1-1/2" X 2-1/8"Highlights: 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