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Features an electrochemical carbon monoxide sensing technology as well as an ionization sensor for smoke detection. Can connect to other compatible BRK or First Alert detectors, to ensure all alarms will sound when threat is detected.
Rigorously tested to meet UL standards. 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.

Product 1: protects during a power failure - combo smoke and CO detector operates on a 120VAC power source with 2-AA battery backup.
Product 2: test/hush button – it’s simple to test or hush false alarms by pressing the button right on the face of the device. Product 1: ionization sensing technology - hardwired smoke detector detects invisible fire particles, 85 decibel alarm alerts of fire.

Fire. Or "Warning. Easy installation – battery door is on the front for quick replacement. Smoke detector carbon monoxide detector combo – sounds loud 85 decibel alarm with voice alerts that announce "Fire.


85-db alarm & voice warnings – “fire!” or “Warning: Carbon Monoxide” so you know why the smoke & carbon monoxide detector is sounding.

10-year product life: this 120 v ac combination smoke and carbon monoxide detector features high-quality sensors and components which are built to last 10 years, protecting your home for a decade; it is hardwired into your home's power with a 9 V battery backup. Reliable safety network for complete monitoring: Interconnect up to 18 X-Sense hardwired detectors to detect potential danger anywhere in your home, for complete monitoring and safety.

Easy installation: All mounting hardware is included for fast and simple installation in minutes. Interconnects up to 18 units for full coverage: you can connect up to 18 X-Sense 2-in-1 hardwired alarm, so when one alarm is triggered, all will sound together throughout your home.
Premium quality: made from high-quality materials and components, this hardwired combination alarm offers a long lifespan of up to 10 years.

Protects during a power failure - combo smoke and CO detector operates on a 120VAC power source with 2-AA battery backup.

Product 1: can connect to other compatible BRK or First Alert detectors, to ensure all alarms will sound when threat is detected. Product 1: features an electrochemical Carbon Monoxide sensing technology as well as an ionization sensor that detects the fine particles of a fast-burning fire.
Product 1: 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. Product 2: to ensure complete protection make sure to place one on each level of your home and in each bedroom. Product 2: keep your family safe with this hardwired smoke alarm the battery backup means constant monitoring, even if there's a power failure.

Features electrochemical carbon monoxide sensing technology as well as a photoelectric sensor equipped with Optipath 360 technology that enhances detection with 360 degree access and reliably detects smoke from smoldering fires.
10 year limited warranty; equipped with end of life signal chirp, so you know when it's time to replace the unit for your safety. 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.
1. FIRST ALERT
#ad
White, FIRST ALERT BRK SC9120FF Hardwired Smoke and Carbon Monoxide CO Detector with Battery Backup, 1 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.Features an electrochemical carbon monoxide sensing technology as well as an ionization sensor for smoke detection. Can connect to other compatible BRK or First Alert detectors, to ensure all alarms will sound when threat is detected.
More information #ad
Keep your family safe with this hardwired smoke and carbon monoxide alarm; The battery backup means constant monitoring, even if there's a power failure. Rigorously tested to meet UL standards. 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 | 1.9 Inches |
Length | 5.6 Inches |
Weight | 0.25 Pounds |
Width | 5.6 Inches |
Part Number | SC9120B |
Model | SC9120B |
Warranty | 10 Year Limited |
More information #ad
2. Kidde
#ad
Kidde Smoke & Carbon Monoxide Detector, Voice Alert & Smoke Detector, Hardwired Smoke Alarm with Battery Backup, Hardwired, Interconnect Combination Smoke & CO Alarm, Test-Silence Button, Pack of 6
#adKidde #ad - Product 2: ionization sensing technology - hardwired smoke detector senses invisible fire particles, 85 decibel alarm alerts of fire. Product 1: fire & co detector in 1 unit with alert modes, "Fire! Fire!", LED lights, "warning! Carbon Monoxide!", that states, & voice alarm, or "Low Battery!".Product 1: protects during a power failure - combo smoke and CO detector operates on a 120VAC power source with 2-AA battery backup.
More information #ad
Product 2: still works during power failures - smoke alarm with battery backup operates on a 120V power source with 9V battery included. Product 2: front-load battery door – For quick battery replacements. Product 1: test-hush feature - silences the unit for approximately 9 minutes; tamper-resistant technology deters removal of the unit from the wall or ceiling. Product 2: test/hush button – it’s simple to test or hush false alarms by pressing the button right on the face of the device. Product 1: ionization sensing technology - hardwired smoke detector detects invisible fire particles, 85 decibel alarm alerts of fire.
Brand | Kidde #ad |
More information #ad
3. Kidde
#ad
Voice Alerts, Kidde Smoke & Carbon Monoxide Detector, Combination Smoke & CO Alarm with Battery Backup, Hardwired Interconnect
#adKidde #ad - Carbon Monoxide. ". Hardwired with backup battery - combo smoke and carbon monoxide detector is hardwired into a 120V power source with 9V battery backup.Fire. Or "Warning. Easy installation – battery door is on the front for quick replacement. Smoke detector carbon monoxide detector combo – sounds loud 85 decibel alarm with voice alerts that announce "Fire.
More information #ad
Photoelectric smoke detector senses visible fire particles and electrochemical CO detector provides accurate readings. Will interconnect with up to 24 other devices including smoke, CO and heat alarms. Ul certified, 10-year limited warranty.Brand | Kidde #ad |
Manufacturer | Kidde Safety #ad |
Height | 1.85 Inches |
Length | 5.79 Inches |
Weight | 0.7 Pounds |
Width | 5.79 Inches |
Part Number | 21029735 |
Model | KN-COPE-IC |
Warranty | 7 year limited |
More information #ad
4. Kidde
#ad
Voice Alert, Pack of 2, Kidde Smoke & Carbon Monoxide Detector, Interconnect Combination Smoke & CO Alarm with Battery Backup, Hardwired
#adKidde #ad - Test-hush feature - silences the unit for approximately 9 minutes; tamper-resistant technology deters removal of the unit from the wall or ceiling. Fire & co detector in 1 unit with alert modes, "warning! Carbon Monoxide!", LED lights, "Fire! Fire!", & voice alarm, that states, or "Low Battery!".More information #ad
Ionization sensing technology - hardwired smoke detector detects invisible fire particles, 85 decibel alarm alerts of fire. Protects during a power failure - combo smoke and CO detector operates on a 120VAC power source with 2-AA battery backup. Ul certified, 10-year limited warranty.Brand | Kidde #ad |
Manufacturer | Kidde #ad |
Height | 5.6 Inches |
Length | 2.64 Inches |
Weight | 0.75 Pounds |
Width | 1.8 Inches |
Part Number | 900-0114A |
Model | KN-COSM-IBA |
Warranty | 10 year limited manufacturer |
More information #ad
5. Kidde
#ad
Kidde Smoke & Carbon Monoxide Detector, Hardwired with Lithium Battery Backup, Voice Warning, 6-pack
#adKidde #ad - Hush feature silences nuisance or “false” alarms – with just the push of a button on the alarm itself. Ul certified, 10-year limited warranty. Interconnect alarms – allows you to connect up to 24 Kidde devices of this type, giving you trusted detection throughout your home.85-db alarm & voice warnings – “fire!” or “Warning: Carbon Monoxide” so you know why the smoke & carbon monoxide detector is sounding.
More information #ad
Pack of 6. Hardwired alarms with tamper proof backup battery – to help protect your home and family during power outages, eliminates the need for battery replacement. Advanced technology – smoke and carbon monoxide detectors combine ionization & electrochemical sensors to detect invisible fire particles & CO gas.Brand | Kidde #ad |
Manufacturer | Kidde #ad |
Height | 5.5 Inches |
Length | 2.64 Inches |
Weight | 1 Pounds |
Width | 1.75 Inches |
Part Number | i12010SCO |
Model | i12010SCO |
Warranty | 10 year limited manufacturer |
More information #ad
6. X-Sense
#ad
Hardwired Interconnected Smoke and CO Detector Alarm with Replaceable Battery Backup, 3-Pack, XP06, X-Sense AC Hardwired Combination Smoke and Carbon Monoxide Detector
#adX-Sense #ad - Detects both smoke and co: the x-sense detector features a photoelectric smoke sensor that detects smoke from slow-burning fires, as well as an electrochemical CO sensor that detects dangerous CO levels in the air. If one alarm goes off, all emit a loud 85 db sound, to ensure that everyone in your house is alerted; the backup battery ensures that all units are always connected and continue to function normally, all of them will: when one alarm is triggered, even in the event of a power failure.More information #ad
Single button control: simply press the test/silence button on one of the units to test or silence the entire interlinked system, user-friendly central button allows for easy control with a long stick, without the need to operate each unit individually; the large, with no climbing ladder required.110-year product life: this 120 v ac combination smoke and carbon monoxide detector features high-quality sensors and components which are built to last 10 years, protecting your home for a decade; it is hardwired into your home's power with a 9 V battery backup. Reliable safety network for complete monitoring: Interconnect up to 18 X-Sense hardwired detectors to detect potential danger anywhere in your home, for complete monitoring and safety.
Brand | X-Sense #ad |
Manufacturer | X-Sense #ad |
Height | 1.5 Inches |
Length | 5.5 Inches |
Weight | 0.51 Pounds |
Width | 5.5 Inches |
Warranty | 60-day money-back guarantee, 5-year quality warranty, and lifetime technical support |
More information #ad
7. X-Sense
#ad
XP04, 3-Pack, Hardwired Interconnected Smoke and CO Detector Alarm with Replaceable Battery Backup, X-Sense Hardwired Combination Smoke and Carbon Monoxide Detector
#adX-Sense #ad - Hardwired alarm with replaceable battery backup: this combination smoke and carbon monoxide detector is AC hardwired with a 9 V battery backup, so the alarm can continuously monitor for smoke and CO even if there is a power outage.Easy installation: All mounting hardware is included for fast and simple installation in minutes. Interconnects up to 18 units for full coverage: you can connect up to 18 X-Sense 2-in-1 hardwired alarm, so when one alarm is triggered, all will sound together throughout your home.
More information #ad
More accurate with intelligent technology: this hardwired smoke and carbon monoxide detector combines an advanced photoelectric smoke sensor and a Figaro electrochemical CO sensor to detect smoke from smoldering fires and dangerous CO levels quickly. Premium quality: made from high-quality materials and components, this hardwired combination alarm offers a long lifespan of up to 10 years.
Brand | X-Sense #ad |
Manufacturer | X-Sense #ad |
More information #ad
8. Kidde
#ad
Hardwired, Interconnect Combination Smoke & CO Alarm with Battery Backup, Kidde Smoke & Carbon Monoxide Detector, Voice Alert
#adKidde #ad - Ul certified, 10-year limited warranty. 120v ac, all kidde brand hard wired smoke alarms are interconnectable with the KN-COSM-IBA. Test-hush feature - silences the unit for approximately 9 minutes; tamper-resistant technology deters removal of the unit from the wall or ceiling.Protects during a power failure - combo smoke and CO detector operates on a 120VAC power source with 2-AA battery backup.
More information #ad
Meets safety standards set by Underwriters Laboratories UL and interconnects with other KN-COSM-IBA models. Fire & co detector in 1 unit with alert modes, that states, led lights, "Warning! Carbon Monoxide!", "Fire! Fire!", & voice alarm, or "Low Battery!". Ionization sensing technology - hardwired smoke detector detects invisible fire particles, 85 decibel alarm alerts of fire.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
9. FIRST ALERT
#ad
First Alert BRK SC9120B-6 Hardwired Smoke and Carbon Monoxide Detector CO with Battery Backup. 6-Pack & BRK 9120B Hardwired Smoke Alarm with Battery Backup , White
#adFIRST ALERT #ad - Product 1: 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. Product 2: equipped with an ionization sensor, this smoke alarm reliably detects smoke from fast flaming fires and alerts you with an 85 decibel alarm.Product 1: can connect to other compatible BRK or First Alert detectors, to ensure all alarms will sound when threat is detected. Product 1: features an electrochemical Carbon Monoxide sensing technology as well as an ionization sensor that detects the fine particles of a fast-burning fire.
More information #ad
Product 2: can connect to other compatible BRK or first alert smoke detectors, to ensure all alarms will sound when smoke is detected. Product 1: 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. Product 2: to ensure complete protection make sure to place one on each level of your home and in each bedroom. Product 2: keep your family safe with this hardwired smoke alarm the battery backup means constant monitoring, even if there's a power failure.
Brand | FIRST ALERT #ad |
More information #ad
10. FIRST ALERT
#ad
White, First Alert BRK SC7010B Hardwired Smoke and Carbon Monoxide CO Detector with Battery Backup
#adFIRST ALERT #ad - In case of danger, the loud spread spectrum alarm is designed to be heard easily by even those with some hearing issues. Rigorously tested to meet UL standards. Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety.Features electrochemical carbon monoxide sensing technology as well as a photoelectric sensor equipped with Optipath 360 technology that enhances detection with 360 degree access and reliably detects smoke from smoldering fires.
More information #ad
Keep your family safe with this hardwired smoke and carbon monoxide alarm; The battery backup means constant monitoring, even if there's a power failure. Can connect to other compatible BRK or First Alert detectors, to ensure all alarms will sound when threat is detected. 10 year limited warranty; equipped with end of life signal chirp, so you know when it's time to replace the unit for your safety. 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 Inches |
Length | 5 Inches |
Weight | 0.7 Pounds |
Width | 5 Inches |
Part Number | SC7010B |
Model | SC7010B |
Warranty | 7 Year Limited Warranty |
More information #ad