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

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

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

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