First Alert 1046884 Smoke and Carbon Monoxide Alarm, Ionization Sensor

Alarm Type : Audible
Sound Level : 85 DB
Sensor Type : Ionization
Power Supply : 120 V
Color : White
Dimensions : 5.6 In L X 5.6 In W X 1.9 In H
Includes : Adapter Plugs, Batteries

Sensor Type : Electrochemical, Photoelectric
Power Source : Battery
Color : White
Dimensions : 5.13 In L X 5.13 In W X 1 In H

Sound Level : 85 DB
Sensor Type : Ionization, Photoelectric
Power Supply : 120 V
Operating Temperature : 40 To 100 Deg F
Color : White
Dimensions : 5.7 In L X 5.7 In W X 2.4 In H
Includes : (2) AA Battery Backup