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Phone alerts: nest protect sends you a message when there's a problem or the batteries run low. App silence: nest protect is the first alarm you can hush from your phone.
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. 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. Wireless: working wi-fi connection: 802. 11b/g/n @ 2. 4ghz wireless reconnect: 802. 15. 4 @ 2.

Mobile + voice alerts alarm sends emergency notifications, via your phone, while voice alerts tell you the type and location of danger.
Interconnectivity: unlike other smart combo alarms, Onelink can connect with any other hardwired alarms in your home including First Alert and non-First Alert brands, and can send a mobile notification for any detected emergency, keeping your whole home safe and connected.

Interconnectivity: unlike other smart combo alarms, safe and sound can connect with any other hardwired alarms in your home including First Alert and non First Alert brands, and can send a mobile notification for any detected emergency, keeping your whole home safe and connected.
Alexa enabled: you can talk to alexa on your safe and sound, control smart home devices, and ask it to play music or podcasts from Music, fill you in on the news, and more, check weather, read audiobooks, and more; plus Alexa’s always adding skills, Spotify, Pandora, so it gets smarter over time. Airplay 2 enables a wireless multi room audio system, creating an easy way to stream music anywhere in the home to different iOS and other AirPlay 2 compatible devices. Safe & sound supports AirPlay 2 and requires iOS 12. 2 or later or macOS 1014.


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.


Includes an 85-decibel horn, single test/silence button, side access to a tamper-resistant battery door, and pins that lock the alarm to the mounting bracket.
Photoelectric smoke sensor helps reduce false alarms caused by cooking or shower steam. Certified to work with smart home systems such as ring Alarm, Samsung SmartThings, and Nexia Home Intelligence when connected to a Z-Wave Plus gateway hub sold separately; Not compatible with Wink or Onelink. Enjoy improved compatibility, easier setup and a seamless in-app experience.

Equipped with photoelectric smoke sensor optimized to detect larger smoke particles produced by smoldering fires; helps minimize the number of false alarms. Includes test/silence button, low-battery warning, EZ access battery door.

Meets safety standards set by Underwriters Laboratories UL and interconnects with other KN-COSM-IBA models. Protects during a power failure - combo smoke and CO detector operates on a 120VAC power source with 2-AA battery backup.

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. Easy installation: All mounting hardware is included for fast and simple installation in minutes.
1. Google
#ad
Smoke Alarm, Google Nest Protect, Wired, White, Smoke Detector and Carbon Monoxide Detector
#adGoogle #ad - 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. Nest protect uses two wavelengths of light to look for both fast and slow burning fires.Phone alerts: nest protect sends you a message when there's a problem or the batteries run low. App silence: nest protect is the first alarm you can hush from your phone.
More information #ad
When there’s co, nest Protect tells you where it’s hiding. App silence: nest protect is the first alarm you can hush from your phone. Nest protect tells you where it's hiding. Fast detection: every second counts. 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. 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. Wireless: working wi-fi connection: 802. 11b/g/n @ 2. 4ghz wireless reconnect: 802. 15. 4 @ 2.
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
2. FIRST ALERT
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Onelink by FIRST ALERT Smoke Detector and Carbon Monoxide Detector | Hardwired | First Alert
#adFIRST ALERT #ad - Compatibility compatible with apple HomeKit; can be used on both Apple and Android devices. A home safety network + alexa interconnects with existing traditional hardwired alarms and other Onelink devices sold separately to create a smart home safety network, so if one alarm sounds, they all sound; works with Amazon Alexa so you can ask Alexa to check the status of your Onelink alarm Alexa device sold separately.Mobile + voice alerts alarm sends emergency notifications, via your phone, while voice alerts tell you the type and location of danger.
More information #ad
Smoke + co detection 2-in-1 smart smoke and carbon monoxide alarm alerts you to both types of danger in your home, with a photoelectric smoke sensor and electrochemical carbon monoxide sensor. Hardwired + battery backup hardwired alarm includes a 10-year sealed battery backup for protection in power outages; for maximum protection, hardwired alarms should be installed on every level of the home and inside each sleeping area. Interconnectivity: unlike other smart combo alarms, Onelink can connect with any other hardwired alarms in your home including First Alert and non-First Alert brands, and can send a mobile notification for any detected emergency, keeping your whole home safe and connected.
Brand | FIRST ALERT #ad |
Manufacturer | First Alert #ad |
Height | 1.57 Inches |
Length | 5.88 Inches |
Weight | 0.75 Pounds |
Width | 5.88 Inches |
Part Number | 1042135 |
Model | 1039287 |
More information #ad
3. FIRST ALERT
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Smart Hardwired Smoke + Carbon Monoxide Alarm and Premium Home Speaker with Amazon Alexa, First Alert Onelink Safe & Sound
#adFIRST ALERT #ad - To use airplay 2, update your devices to the latest software version and add your AirPlay 2-compatible speakers to the Home app on your iOS device. About safe and sound: first alert introduces onelink safe and sound, an Alexa enabled, Apple HomeKit compatible hardwired photoelectric smoke and electrochemical carbon monoxide alarm, featuring a state of the art, Omni directional speaker backed by First Alert’s unparalleled reliability and equipped with the power of Alexa.Interconnectivity: unlike other smart combo alarms, safe and sound can connect with any other hardwired alarms in your home including First Alert and non First Alert brands, and can send a mobile notification for any detected emergency, keeping your whole home safe and connected.
More information #ad
Easy to install: optimal ceiling placement enhances the speaker’s acoustic quality; make installation fast and easy by using the included AC adapter plugs to replace your existing hardwire alarms without rewiring AC power is required for Onelink Safe and Sound. Alexa enabled: you can talk to alexa on your safe and sound, control smart home devices, and ask it to play music or podcasts from Music, fill you in on the news, and more, check weather, read audiobooks, and more; plus Alexa’s always adding skills, Spotify, Pandora, so it gets smarter over time. Airplay 2 enables a wireless multi room audio system, creating an easy way to stream music anywhere in the home to different iOS and other AirPlay 2 compatible devices. Safe & sound supports AirPlay 2 and requires iOS 12. 2 or later or macOS 1014.
Brand | FIRST ALERT #ad |
Manufacturer | First Alert #ad |
Height | 2 Inches |
Length | 7 Inches |
Weight | 1.76 Pounds |
Width | 7 Inches |
Part Number | 1039102 |
Model | 1039102 |
Warranty | 3 year limited warranty |
More information #ad
4. Kidde
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Voice Alert, Pack of 2, Kidde Smoke & Carbon Monoxide Detector, Hardwired, Interconnect Combination Smoke & CO Alarm with Battery Backup
#adKidde #ad - Ul certified, 10-year limited warranty. 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
Ionization sensing technology - hardwired smoke detector detects invisible fire particles, 85 decibel alarm alerts of fire. Fire & co detector in 1 unit with alert modes, "warning! Carbon Monoxide!", & voice alarm, "fire! fire!", LED lights, that states, or "Low Battery!".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. FIRST ALERT
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1 pack , FIRST ALERT BRK SC9120FF Hardwired Smoke and Carbon Monoxide CO Detector with Battery Backup, White
#adFIRST ALERT #ad - 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. 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.Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety.
More information #ad
Rigorously tested to meet UL standards. Features an electrochemical carbon monoxide sensing technology as well as an ionization sensor for smoke detection. 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. 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.
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 | 7 Year Limited |
More information #ad
6. Kidde
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Voice Alert, Kidde Smoke & Carbon Monoxide Detector, Battery Powered, Combination Smoke & CO Alarm
#adKidde #ad - Fire. And voice alarm, LED lights, or "Low Battery. ". Test-hush feature - silences the unit for approximately 8 minutes; tamper-resistant technology deters removal of the unit from the wall or ceiling. Carbon Monoxide.More information #ad
That states, "Fire. Protects during a power failure - combo smoke and CO alarm operates on 2-AA batteries. Ionization sensor technology - smoke detector detects invisible fire particles, 85 decibel alarm alerts of fire. Ul certified, 10-year limited warranty. Fire and co detector in 1 unit with alert modes, "warning.Brand | Kidde #ad |
Manufacturer | Kidde Safety #ad |
Height | 5.6 Inches |
Length | 1.8 Inches |
Weight | 0.8 Pounds |
Width | 5.6 Inches |
Part Number | 21026043 |
Model | KN-COSM-BA |
Warranty | 5-year limited warranty |
More information #ad
7. FIRST ALERT
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First Alert Z-Wave Smoke Detector & Carbon Monoxide Alarm, 2nd Generation, Works with Ring Alarm
#adFIRST ALERT #ad - Help keep your family safe with this battery-powered smoke detector and carbon monoxide alarm; includes 2 AA batteries. The z-wave plus with smart start feature allows a faster and more intuitive connection of device to hub and on-boarding via QR code scan located on device.Includes an 85-decibel horn, single test/silence button, side access to a tamper-resistant battery door, and pins that lock the alarm to the mounting bracket.
More information #ad
Receive real-time notifications in the Ring App when smoke or carbon monoxide is detected. This device is certified to work with Ring; Requires Ring Alarm to Work with Ring. Photoelectric smoke sensor helps reduce false alarms caused by cooking or shower steam. Certified to work with smart home systems such as ring Alarm, Samsung SmartThings, and Nexia Home Intelligence when connected to a Z-Wave Plus gateway hub sold separately; Not compatible with Wink or Onelink. Enjoy improved compatibility, easier setup and a seamless in-app experience.
Brand | FIRST ALERT #ad |
Manufacturer | First Alert #ad |
Height | 8.5 Inches |
Length | 3.66 Inches |
Width | 6.75 Inches |
Part Number | 1044807 |
Model | 1044807 |
Warranty | 7 Year Limited Warranty |
More information #ad
8. FIRST ALERT
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SA521CN-3ST , White, FIRST ALERT Hardwired Wireless Smoke Alarm with Photoelectric Sensor and Battery Backup
#adFIRST ALERT #ad - 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.Equipped with photoelectric smoke sensor optimized to detect larger smoke particles produced by smoldering fires; helps minimize the number of false alarms. Includes test/silence button, low-battery warning, EZ access battery door.
More information #ad
Wirelessly connect up to 18 First Alert enabled alarms for the maximum in whole-home protection. Help keep your family safe with this hardwired smoke alarm that wirelessly interconnects with other First Alert–enabled alarms to create a home safety network. Hardwired alarm includes 2 AA backup batteries for continued monitoring in the event of a power outage.Brand | FIRST ALERT #ad |
Manufacturer | First Alert #ad |
Height | 5 Inches |
Length | 5 Inches |
Weight | 0.78 Pounds |
Width | 2 Inches |
Part Number | SA520B-SA521CN |
Model | SA521CN-3ST |
More information #ad
9. Kidde
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Kidde Smoke & Carbon Monoxide Detector, Hardwired, Voice Alert, Interconnect Combination Smoke & CO Alarm with Battery Backup
#adKidde #ad - 120v ac, all kidde brand hard wired smoke alarms are interconnectable with the KN-COSM-IBA. 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. Protects during a power failure - combo smoke and CO detector operates on a 120VAC power source with 2-AA battery backup.
More information #ad
Fire & co detector in 1 unit with alert modes, led lights, that states, & voice alarm, "Fire! Fire!", "Warning! Carbon Monoxide!", 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. 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
10. X-Sense
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Hardwired Interconnected Smoke and CO Detector Alarm with Replaceable Battery Backup, X-Sense Hardwired Combination Smoke and Carbon Monoxide Detector, XP04, Pack of 3
#adX-Sense #ad - Premium quality: made from high-quality materials and components, this hardwired combination alarm offers a long lifespan of up to 10 years. 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.More information #ad
Interconnects up to 24 units for full coverage: you can connect up to 24 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. Easy installation: All mounting hardware is included for fast and simple installation in minutes.
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