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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.
Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety. 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.

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.

The split-spectrum Sensor looks for both fast and slow burning fires. Nest protect uses two wavelengths of light to look for both fast and slow burning fires.
Tells you what and where: it speaks up to tell you if there’s smoke or CO and where the problem is, so you know what to do. App silence: nest protect is the first alarm you can hush from your phone. Field of view 120°. Wireless: working wi-fi connection: 802. 11b/g/n @ 2. 4ghz wireless reconnect: 802. 15. 4 @ 2. 4ghz wireless interconnect: 802.

Rigorously tested to meet UL standards. 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. In case of danger, the loud spread spectrum alarm is designed to be heard easily by even those with some hearing issues.

Hush feature silences nuisance or “false” alarms – with just the push of a button on the alarm itself. Ul certified, 10-year limited warranty. Hardwired alarm with tamper proof backup battery – to help protect your home and family during power outages, eliminates the need for battery replacement.


". Will interconnect with up to 24 other devices including smoke, CO and heat alarms. Photoelectric smoke detector senses visible fire particles and electrochemical CO detector provides accurate readings.

Product 2: ionization sensing technology - hardwired smoke detector senses invisible fire particles, 85 decibel alarm alerts of fire.
Product 2: still works during power failures - smoke alarm with battery backup operates on a 120V power source with 9V battery included. Product 1: ionization sensing technology - hardwired smoke detector detects invisible fire particles, 85 decibel alarm alerts of fire.

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 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.

Wide coverage for full home protection: Up to 24 X-Sense Link+ devices can be interconnected to create a wireless safety network for your entire house.
1. FIRST ALERT
#ad
White, FIRST ALERT BRK SC9120FF Hardwired Smoke and Carbon Monoxide CO Detector with Battery Backup, 1 pack
#adFIRST ALERT #ad - 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.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.
More information #ad
Rigorously tested to meet UL standards. Can connect to other compatible BRK or First Alert detectors, to ensure all alarms will sound when threat is detected. 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. Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety. 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.
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
Voice Alert, Interconnect Combination Smoke & CO Alarm with Battery Backup, Kidde Smoke & Carbon Monoxide Detector, Hardwired
#adKidde #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, & voice alarm, "Fire! Fire!", "Warning! Carbon Monoxide!", that states, LED lights, or "Low Battery!".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.
More information #ad
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. Ul certified, 10-year limited warranty.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
3. Google
#ad
Wired, White, Smoke Detector and Carbon Monoxide Detector, Smoke Alarm, Google Nest Protect
#adGoogle #ad - When there’s co, nest Protect tells you where it’s hiding. Simply walk to the Nest Protect that noticed the problem and open the Nest app. Fast detection: every second counts. Smoke and co locator: nest protect speaks up if there's smoke or CO and tells you where it is so you know what to do.The split-spectrum Sensor looks for both fast and slow burning fires. Nest protect uses two wavelengths of light to look for both fast and slow burning fires.
More information #ad
Know from anywhere: connect nest protect to Wi-Fi and it will send an alert to your phone if the alarm goes off or the batteries run low. Tells you what and where: it speaks up to tell you if there’s smoke or CO and where the problem is, so you know what to do. App silence: nest protect is the first alarm you can hush from your phone. Field of view 120°. Wireless: working wi-fi connection: 802. 11b/g/n @ 2. 4ghz wireless reconnect: 802. 15. 4 @ 2. 4ghz wireless interconnect: 802.
Brand | Google #ad |
Manufacturer | Google Nest #ad |
Height | 5.3 Inches |
Length | 5.3 Inches |
Weight | 1 Pounds |
Width | 1.5 Inches |
Part Number | S3003LWES |
Model | 06C |
More information #ad
4. FIRST ALERT
#ad
White, First Alert BRK SC7010B Hardwired Smoke and Carbon Monoxide CO Detector with Battery Backup
#adFIRST ALERT #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. 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.Rigorously tested to meet UL standards. Can connect to other compatible BRK or First Alert detectors, to ensure all alarms will sound when threat is detected.
More information #ad
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. 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. In case of danger, the loud spread spectrum alarm is designed to be heard easily by even those with some hearing issues.
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
5. Kidde
#ad
Kidde Smoke & Carbon Monoxide Detector, Voice Warning, Hardwired with Lithium Battery Backup
#adKidde #ad - Advanced technology – smoke and carbon monoxide detector combines ionization & electrochemical sensors to detect invisible fire particles & CO gas.Hush feature silences nuisance or “false” alarms – with just the push of a button on the alarm itself. Ul certified, 10-year limited warranty. Hardwired alarm with tamper proof backup battery – to help protect your home and family during power outages, eliminates the need for battery replacement.
More information #ad
85db alarm & voice warnings – “fire. Or “warning: carbon monoxide” so you know why the smoke & carbon monoxide detector is sounding. Interconnect alarms – allows you to connect up to 24 Kidde devices of this type, giving you trusted detection throughout your home.Brand | Kidde #ad |
Manufacturer | Kidde Safety #ad |
Height | 5.5 Inches |
Length | 5.5 Inches |
Weight | 1 Pounds |
Width | 1.5 Inches |
Part Number | 21029756 |
Model | i12010SCO |
Warranty | 10 year limited warranty |
More information #ad
6. Kidde
#ad
Kidde Smoke & Carbon Monoxide Detector, Battery Powered, Voice Alert, Combination Smoke & CO Alarm
#adKidde #ad - Ionization sensor technology - smoke detector detects invisible fire particles, 85 decibel alarm alerts of fire. Carbon Monoxide. And voice alarm, or "Low Battery. ". Ul certified, 10-year limited warranty. Fire. Led lights, that states, "Warning.More information #ad
Protects during a power failure - combo smoke and CO alarm operates on 2-AA batteries. Fire and co detector in 1 unit with alert modes, "fire. 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 | KN-COSM-BA |
Warranty | 5-year limited warranty |
More information #ad
7. Kidde
#ad
Voice Alerts, Kidde Smoke & Carbon Monoxide Detector, Hardwired Interconnect, Combination Smoke & CO Alarm with Battery Backup
#adKidde #ad - Easy installation – battery door is on the front for quick replacement. Ul certified, 10-year limited warranty. Carbon Monoxide.". Will interconnect with up to 24 other devices including smoke, CO and heat alarms. Photoelectric smoke detector senses visible fire particles and electrochemical CO detector provides accurate readings.
More information #ad
Hardwired with backup battery - combo smoke and carbon monoxide detector is hardwired into a 120V power source with 9V battery backup. Smoke detector carbon monoxide detector combo – sounds loud 85 decibel alarm with voice alerts that announce "Fire. Fire. Or "Warning.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
8. Kidde
#ad
Pack of 6, Kidde Smoke & Carbon Monoxide Detector, Hardwired Smoke Alarm with Battery Backup, Hardwired, Voice Alert & Smoke Detector, Test-Silence Button, Interconnect Combination Smoke & CO Alarm
#adKidde #ad - Product 1: fire & co detector in 1 unit with alert modes, "fire! Fire!", "Warning! Carbon Monoxide!", LED lights, & voice alarm, that states, 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.Product 2: ionization sensing technology - hardwired smoke detector senses invisible fire particles, 85 decibel alarm alerts of fire.
More information #ad
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 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: still works during power failures - smoke alarm with battery backup operates on a 120V power source with 9V battery included. Product 1: ionization sensing technology - hardwired smoke detector detects invisible fire particles, 85 decibel alarm alerts of fire.
Brand | Kidde #ad |
More information #ad
9. X-Sense
#ad
X-Sense Hardwired Combination Smoke and Carbon Monoxide Detector, Hardwired Interconnected Smoke and CO Detector Alarm with Replaceable Battery Backup, 1-Pack, XP04
#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
Premium quality: made from high-quality materials and components, this hardwired combination alarm offers a long lifespan of up to 10 years. 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.
Brand | X-Sense #ad |
Manufacturer | X-Sense #ad |
Height | 1.5 Inches |
Length | 5.5 Inches |
Weight | 0.5 Pounds |
Width | 5.5 Inches |
Part Number | XP04 |
Model | XP04 |
Warranty | 60-day money-back guarantee, 5-year quality warranty, and lifetime technical support |
More information #ad
10. X-Sense
#ad
SC07-W, Pack of 6, X-Sense Wireless Interconnected Combination Smoke and Carbon Monoxide Detector with LCD Display & 10-Year Battery, Over 820 ft Transmission Range
#adX-Sense #ad - 2-in-1 protection: equipped with both a photoelectric smoke sensor and an electrochemical CO sensor to provide reliable protection against both smoke and CO. Real-time co readings: the smoke and carbon monoxide alarm displays real-time CO levels from 30–999 ppm parts per million taken from the surrounding air, as well as battery level and working status.Wide coverage for full home protection: Up to 24 X-Sense Link+ devices can be interconnected to create a wireless safety network for your entire house.
More information #ad
Built-in 10-year battery: features a built-in 10-year lithium battery, so you’ll never need to worry about replacing batteries during the lifetime of the unit. Hear an alarm from anywhere: if one alarm detects smoke or dangerous CO levels, all wireless interconnected units will activate, ensuring the earliest possible warning.Brand | X-Sense #ad |
Manufacturer | X-Sense #ad |
Height | 2 Inches |
Length | 5.7 Inches |
Weight | 1 Pounds |
Width | 5.7 Inches |
Warranty | 60-day money-back guarantee and 5-year quality warranty and lifetime technical support |
More information #ad