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Fire & co detector in 1 unit with alert modes, LED lights, test-silence button, & Replacement Alert: a chirp that notifies when the unit needs to be replaced. No battery replacement needed - combo smoke and CO detector operates on a non-replaceable, 10-year lithium battery.


Can connect to other compatible BRK or First Alert detectors, to ensure all alarms will sound when threat is detected. Keep your family safe with this 6-pack of hardwired smoke and carbon monoxide alarms; The battery backup means constant monitoring, even if there's a power failure.
Simple to use, with a single test/silence button, and side-load battery compartment; tamper-resistant locking brackets and universal mounting brackets make installation easy. First alert has been the most trusted brand in home safety since launching the first residential smoke alarm in 1958 Based on a First Alert Brand Trust Survey in February 2018.

7 year limited warranty; equipped with end of life signal chirp, so you know when it’s time to replace the unit for safety; All first alert alarms are rigorously tested to meet UL standards.
First alert has been the most trusted brand in home safety since launching the first residential smoke alarm in 1958 Based on a First Alert Brand Trust Survey in February 2018. Low battery signal mute, quiets low battery signal for up to 8 hours. Keep your family safe with this battery operated smoke and carbon monoxide alarm; Battery powered alarms provide continuous monitoring of CO levels, even if there's a power failure.

Large lcd display: clearly displays battery level and the real-time CO levels in PPM parts per million taken from the surrounding air, with an updated measurement taken every 10 seconds.
Led indicator: clearly informs you of the working status of the alarm with its 3-color flashing LED indicator green LED indicates normal operation, and yellow LED indicates a fault, red LED indicates the alarm status, ensuring the safety and security of your home 24/7. Assured quality: approved by the etl and meets the ul 217 and UL 2034 safety standards;comes with a 60-day money-back guarantee, a 5-year warranty, and lifetime customer support.

Meets safety standards set by Underwriters Laboratories UL and interconnects with other KN-COSM-IBA models. Temperature Range-40˚F 4. 4˚c to 100˚f 37. 8˚c. 120v ac, all kidde brand hard wired smoke alarms are interconnectable with the KN-COSM-IBA.


Two alarms in one detects carbon monoxide and explosive gas. Three convenient mounting options. Battery backup 9 volt battery included. Easy to install - combo smoke and gas alarm is powered by a 120VAC wall outlet with 9V battery backup.

1. Kidde
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Hardwired with Lithium Battery Backup, Kidde Smoke & Carbon Monoxide Detector
#adKidde #ad - Intelligent technology - combines ionization & electrochemical sensors to detect invisible fire particles & CO gas, 85 decibel alarm alerts of fire.Fire & co detector in 1 unit with alert modes, LED lights, test-silence button, & Replacement Alert: a chirp that notifies when the unit needs to be replaced. No battery replacement needed - combo smoke and CO detector operates on a non-replaceable, 10-year lithium battery.
More information #ad
Replacement alert - can be silenced for 3 days at a time, maximum of 30 days; tamper-resistant technology deters removal of the unit or battery from the wall or ceiling. Ul certified, 10-year limited warranty.Brand | Kidde #ad |
Manufacturer | Kidde Safety #ad |
Height | 5.5 Inches |
Length | 5.5 Inches |
Width | 1.5 Inches |
Part Number | 21029756 |
Model | i12010SCO |
Warranty | 10 year limited warranty |
More information #ad
2. Kidde
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Test-Silence Button, Hardwired Smoke Alarm with Lithium Battery Backup, Interconnect, Kidde Smoke Detector
#adKidde #ad - Test-hush feature - silences the unit for approximately 9 minutes. Whole home family protection - place 1 fire detector on each level of your home & in your bedroom - maximum of 24 Kidde smoke or CO detectors can be interconnected in a multiple stations.More information #ad
Ionization sensing technology - hardwired smoke detector detects visible fire particles, 85 decibel alarm alerts of fire. Protects during a power failure - smoke alarm operates on a 120V power source with 3V lithium battery backup. Ul certified, 10-year limited warranty.Brand | Kidde #ad |
Manufacturer | Kidde Safety #ad |
Height | 5.5 Inches |
Length | 5.5 Inches |
Weight | 0.88 Pounds |
Width | 1.75 Inches |
Part Number | 21029760 |
Model | i12010S |
Warranty | 10 year limited warranty |
More information #ad
3. FIRST ALERT
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First Alert BRK SC9120B-6 Hardwired Smoke and Carbon Monoxide Detector CO with Battery Backup. 6-Pack
#adFIRST ALERT #ad - Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety. Indicator lights on the face of the unit display the presence of smoke or carbon monoxide, while an 85-decibel siren provides a clear, loud warning upon detection.Can connect to other compatible BRK or First Alert detectors, to ensure all alarms will sound when threat is detected. Keep your family safe with this 6-pack of hardwired smoke and carbon monoxide alarms; The battery backup means constant monitoring, even if there's a power failure.
More information #ad
Features an electrochemical Carbon Monoxide sensing technology as well as an ionization sensor that detects the fine particles of a fast-burning fire. Simple to use, with a single test/silence button, and side-load battery compartment; tamper-resistant locking brackets and universal mounting brackets make installation easy. First alert has been the most trusted brand in home safety since launching the first residential smoke alarm in 1958 Based on a First Alert Brand Trust Survey in February 2018.
Brand | FIRST ALERT #ad |
Manufacturer | First Alert #ad |
Height | 2.2 Inches |
Length | 5.6 Inches |
Weight | 0.7 Pounds |
Width | 5.6 Inches |
Part Number | SC9120BFF-6 |
Model | BRK SC9120B-6 |
More information #ad
4. FIRST ALERT
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First Alert SCO5CN Combination Smoke and Carbon Monoxide Detector, Battery Operated
#adFIRST ALERT #ad - Battery operated unit installs quickly and easily without an electrician. It can ship within the US except New York. Emits T3 Pattern. Indicator lights on the face of the unit display the presence of smoke or carbon monoxide, while an 85 decibel siren provides a clear, loud warning upon detection.7 year limited warranty; equipped with end of life signal chirp, so you know when it’s time to replace the unit for safety; All first alert alarms are rigorously tested to meet UL standards.
More information #ad
Features an electrochemical carbon monoxide sensing technology as well as a photoelectric sensor that detects the larger particles of a smoldering fire. Simple to use, with a single test/silence button; EZ access battery drawer allows you to change battery without removing alarm from ceiling. First alert has been the most trusted brand in home safety since launching the first residential smoke alarm in 1958 Based on a First Alert Brand Trust Survey in February 2018. Low battery signal mute, quiets low battery signal for up to 8 hours. Keep your family safe with this battery operated smoke and carbon monoxide alarm; Battery powered alarms provide continuous monitoring of CO levels, even if there's a power failure.
Brand | FIRST ALERT #ad |
Manufacturer | First Alert #ad |
Height | 5 Inches |
Length | 2 Inches |
Weight | 0.6 Pounds |
Width | 5 Inches |
Part Number | SCO5CN |
Model | SCO5CN |
Warranty | ------- |
More information #ad
5. X-Sense
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X-Sense 10-Year Battery Not Hardwired Combination Smoke & Carbon Monoxide Alarm Detector with LCD Display, Compliant with UL 217 & UL 2034 Standards, SC07
#adX-Sense #ad - Built-in 10-year battery: provides 10 years of continuous power with a built-in lithium battery, saving on energy while remaining eco-friendly; saves you from constantly having to change batteries or wonder if your alarm is still functioning. Accurate, reliable & highly sensitive: the x-sense combination smoke and co alarm has been redesigned from the inside out; it will ensure that smoke triggers the alarm instead of interference by taking 3 separate smoke samples from the surrounding air; a full 360° ring of air intakes ensures complete detection with no blind spots.Large lcd display: clearly displays battery level and the real-time CO levels in PPM parts per million taken from the surrounding air, with an updated measurement taken every 10 seconds.
More information #ad
2-in-1 protection: equipped with both photoelectric and electrochemical CO sensors that work independently of each other; instantly notifies you when dangerous smoke or CO concentration is detected while minimizing false alarms; provides the ultimate protection from 2 deadly threats, all contained in 1 unit. Led indicator: clearly informs you of the working status of the alarm with its 3-color flashing LED indicator green LED indicates normal operation, and yellow LED indicates a fault, red LED indicates the alarm status, ensuring the safety and security of your home 24/7. Assured quality: approved by the etl and meets the ul 217 and UL 2034 safety standards;comes with a 60-day money-back guarantee, a 5-year warranty, and lifetime customer support.
Brand | X-Sense #ad |
Manufacturer | X-Sense #ad |
Height | 2 Inches |
Length | 5.7 Inches |
Weight | 0.71 Pounds |
Width | 5.7 Inches |
Part Number | SC07 |
Model | SC07 |
Warranty | 60-day money-back guarantee, 5-year quality warranty, and lifetime technical support |
More information #ad
6. Kidde
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Hardwired, Interconnect Combination Smoke & CO Alarm with Battery Backup, Kidde Smoke & Carbon Monoxide Detector, Voice Alert
#adKidde #ad - Protects during a power failure - combo smoke and co detector operates on a 120VAC power source with 2-AA battery backup. Ionization sensing technology - hardwired smoke detector detects invisible fire particles, 85 decibel alarm alerts of fire.Meets safety standards set by Underwriters Laboratories UL and interconnects with other KN-COSM-IBA models. Temperature Range-40˚F 4. 4˚c to 100˚f 37. 8˚c. 120v ac, all kidde brand hard wired smoke alarms are interconnectable with the KN-COSM-IBA.
More information #ad
Ul certified, 10-year limited warranty. Fire & co detector in 1 unit with alert modes, & voice alarm, led lights, "Fire! Fire!", "Warning! Carbon Monoxide!", that states, or "Low Battery!". Test-hush feature - silences the unit for approximately 9 minutes; tamper-resistant technology deters removal of the unit from the wall or ceiling.Brand | Kidde #ad |
Manufacturer | Kidde Safety #ad |
Height | 6 Inches |
Length | 2 Inches |
Weight | 1 Pounds |
Width | 6 Inches |
Part Number | 21026041 |
Model | KN-COSM-IBA |
Warranty | 10 Year Limited |
More information #ad
7. Kidde
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Kidde Smoke Detector, Lithium Battery Powered, Smoke Alarm with Voice Alert
#adKidde #ad - Photoelectric sensor technology - smoke detector detects visible fire particles associated with smoldering fires; 85 decibel alarm alerts of fire. Ul certified, 10-year limited warranty. Smoke detector with alert modes, led lights, "Fire Fire", that states, "warning carbon Monoxide", & voice alarm, or "Low Battery".More information #ad
Whole home family protection - place 1 fire detector on each level of your home & in your bedroom. Test-hush feature - silences the unit for approximately 7 minutes.Brand | Kidde #ad |
Manufacturer | Kidde Safety #ad |
Height | 1.6 Inches |
Length | 5.22 Inches |
Weight | 0.6 Pounds |
Width | 5.22 Inches |
Part Number | 21010161 |
Model | P3010B |
Warranty | 10 year limited warranty |
More information #ad
8. Kidde
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& Explosive Gas Detector, Natural, Digital Display, Kidde Nighthawk Carbon Monoxide Detector & Propane, AC-Plug-In with Battery Backup
#adKidde #ad - Electrochemical sensor technology - detects carbon monoxide & other forms of combustible gas such as propane & natural gas. Digital display and peak level button displays the peak CO level recorded by the alarm since it was last reset.Two alarms in one detects carbon monoxide and explosive gas. Three convenient mounting options. Battery backup 9 volt battery included. Easy to install - combo smoke and gas alarm is powered by a 120VAC wall outlet with 9V battery backup.
More information #ad
Kidde’s carbon monoxide alarms meet the requirements of Underwriters Laboratories UL, an independent facility that tests products for compliance with widely-accepted safety standards. Co detector with digital display & alert modes; 85 decibel alarm alerts of fire. Low battery warning feature indicates when the battery needs replacement. Ul certified, 10-year limited warranty.Brand | Kidde #ad |
Manufacturer | Kidde #ad |
Height | 11 Inches |
Length | 2 Inches |
Weight | 1.2 Pounds |
Width | 8 Inches |
Part Number | KI-21006677 |
Model | Model KN-COEG-3 |
Warranty | 5 Year Limited |
More information #ad
9. Kidde
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Combination Smoke & CO Alarm, Kidde Smoke & Carbon Monoxide Detector, Voice Alert, Battery Powered
#adKidde #ad - Ul certified, 10-year limited warranty. Lonization sensor technology - smoke detector detects invisible fire particles, 85 decibel alarm alerts of fire at 10 feet. Fire & co detector in 1 unit with alert modes, & voice alarm, "Warning Carbon Monoxide", that states, LED lights, "fire Fire", or "Low Battery".More information #ad
Protects during a power failure - combo smoke and CO alarm operates on 2-AA batteries. Test-hush feature - silences the unit for approximately 8 minutes; tamper-resistant technology deters removal of the unit from the wall or ceiling.Brand | Kidde #ad |
Manufacturer | Kidde Safety #ad |
Height | 5.6 Inches |
Length | 1.8 Inches |
Width | 5.6 Inches |
Part Number | 21026043 |
Model | 21026043 |
Warranty | 5-year limited warranty |
More information #ad