First Alert 1046884 Smoke and Carbon Monoxide Alarm, Ionization Sensor (Pack of 12)

Alarm Type : Audible
Sensor Type : Electrochemical
Power Source : Battery
Power Supply : 9 V
Color : White
Dimensions : 5.6 In L X 1.9 In W X 5.6 In H
Includes : Latching Alarm Indicator, Side Load Battery Drawer, Tamper-Resistant Locking Pin, Test/Silence Button, Universal Mounting Bracket

Alarm Type : Audible
Sensor Type : Electrochemical, Photoelectric
Power Source : Battery
Mounting Type : Ceiling, Wall
Dimensions : 6.5 In L X 2.52 In W X 8.5 In H

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

Alarm Type : Audible
Sound Level : 85 DB
Sensor Type : Electrochemical, Photoelectric
Power Source : Battery
Power Supply : 3 V
Mounting Type : Ceiling, Wall
Color : White
Dimensions : 9 In L X 6 In W X 3.13 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

Display Type : LED
Sound Level : 85 DB
Sensor Type : Ionization
Power Source : Lithium-Ion Battery
Power Supply : 3 V
Operating Temperature : 40 To 100 Deg F
Color : White
Dimensions : 2.25 In L X 5.7 In W X 5.7 In H
Includes : End Of Life Signal, Smoke Alarm Status LED Indicator And Test/Silence Button