First Alert 1046850 Smoke Alarm, Ionization Sensor, White White (Pack of 12)

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

Sound Level : 85 DBA
Sensor Type : Ionization
Power Source : Battery
Color : White
Dimensions : 5.6 In L X 5.6 In W X 2 In H

Sensor Type : Ionization
Power Source : 120V With 10yr Battery Back-Up
Color : White
Dimensions : 5.6 In L X 5.6 In W X 1.9 In H

Sensor Type : Photoelectric
Power Source : Battery
Color : White
Dimensions : 5.25 In L X 5.25 In W X 1.19 In H

Sound Level : 85 DBA
Sensor Type : Ionization
Power Source : Battery
Color : White
Dimensions : 5.67 In L X 5.67 In W X 1 In H

Sound Level : 85 DBA
Sensor Type : Ionization
Power Source : Battery
Power Supply : Interconnect Hardwire
Color : White
Dimensions : 5.6 In L X 5.6 In W X 1.9 In H