Use and Care Manual
Worry-Free AC Wire-in Combination  
Smoke & Carbon Monoxide (CO) Alarm
Sealed Lithium Battery Backup
Model i12010SCO
Description
The Kidde i12010SCO is a hardwired combination smoke and 
carbon monoxide alarm that contains a 10-year, sealed battery 
backup. This alarm uses breakthrough technology to offer a fast 
response to real fires, including smoldering and fast-flaming, 
as well as protect you from carbon monoxide and dramatically 
reduce the chance of nuisance alarms. The Intelligent sensor tech-
nology combines the detection capabilities of an ionization smoke 
sensor – which is more likely to detect smaller, less visible fire 
particles, like those produced by flaming fires – with that of an 
electrochemical sensor, which is used to detect CO. Since carbon 
monoxide is present in all fires, having both detection chambers 
work together in one alarm is a breakthrough in the fire safety 
industry. When either sensor notices a potential hazard, it will 
communicate with the other. Depending on what is detected, the 
alarm will adjust its smoke sensitivity in order to better discrimi-
nate between a real hazard and a false one. This constant com-
munication enhances the alarm’s overall performance in all fires, 
and significantly reduces the potential for a nuisance alarm.
Leading authorities recommend that both ionization and photo-
electric smoke alarms be installed to help insure maximum detec-
tion of the various types of fires that can occur within the home. 
Ionization sensing alarms may detect invisible fire particles (associ-
ated with fast flaming fires) sooner than photoelectric alarms. 
Photoelectric sensing alarms may detect visible fire particles (asso-
ciated with slow smoldering fires) sooner than ionization alarms.
The i12010SCO contains a 10-year tamper proof backup battery 
that eliminates the need for battery replacement, and ends worry 
over unauthorized battery removal. The alarm provides continuous 
protection from smoke, fire and carbon monoxide, even during 
power outages. At the end of alarm life, the unit will chirp, indi-
cating the alarm is in need of replacement. The end of life chirp 
can be temporarily silenced, allowing for replacement at a more 
convenient time.
Features and Benefits
• Sealed-In Lithium Battery Backup – no battery replacement 
required over the 10 year life of the alarm. Eliminates worry 
about removal or unauthorized deactivation of alarm.
• Voice Warning System – Verbally announces “FIRE!” or 
“WARNING! CARBON MONOXIDE” to help distinguish  
between threats.
• Smart Interconnect – Interconnects up to 24 Kidde devices  
(of which 18 can be initiating)
• Hush Feature – Temporarily silences nuisance alarms for 
approximately 9 minutes and will not allow hush mode unless  
the unit is in alarm mode.
• Peak Level Memory – Announces “CARBON MONOXIDE 
PREVIOUSLY DETECTED” if alarm has detected CO level of 
100ppm or higher since it was last reset.
• Ionization Sensing Technology – Ideal for detecting fast 
flaming and other types of fires.
• Green LED – Illuminates to indicate the unit is receiving AC 
power. Flashes once every 60 seconds to indicate battery only 
mode. Flashes once per second during alarm to indicate initiating 
alarm. Flashes once every 16 seconds to indicate smoke or CO 
previously detected. Flashes every 2 seconds while the alarm is in 
HUSH mode.
• Red LED  – When a dangerous level of smoke or carbon monox-
ide is detected the red LED will flash. If the unit malfunctions, the 
red LED will flash and the unit will chrip every 30 seconds..
Sealed 3V Lithium Battery Backup 
10-year* tamper proof battery eliminates need for battery replacement.  
Alerts user to replace alarm after 10 years of operation.
Voice Warning 
Warns of hazard by announcing “Fire!” or “Warning, Carbon Monoxide.”
Intelligent Sensor Technology 
Reduces nuisance alarms and offers fast response to real fires.
Test/Hush Button Functions 
A single button that tests alarm circuitry and temporarily silences nuisance alarms.
Two LED Display 
Red LED indicates alarm mode, Green LED indicates AC power is present
Peak Level Memory 
Alerts user when the unit has detected CO  
concentrations of 100ppm or higher.
10
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