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Practical lcd display: clearly indicates real-time carbon monoxide co concentration in the surrounding air, the screen will be backlit blue, as well as the remaining battery life and working status of the alarm; if a CO concentration of 30-999 ppm exists for a certain time period, and the LED indicator will flash red 4 times every 5.8
Simple to use: test/silence button enables you to test the alarm weekly, instantly alerting the entire household, an alarm tone of over 85 dB will sound throughout your entire home, and to easily silence the alarm when false alarms occur; malfunction and low battery warnings allow you to easily know the working status of the alarm; in case of an emergency, even those in sleep.


Nest protect tells you where it's hiding. Detects co: carbon monoxide is an invisible poisonous gas. When there’s co, nest Protect tells you where it’s hiding. Field of view 120°. Split-spectrum sensor: in an emergency seconds count. 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. Tells you what and where: It speaks up to tell you if there's smoke or CO and where. 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. Simply walk to the Nest Protect that noticed the problem and open the Nest app. Wireless: working wi-fi connection: 802.

Led lights indicate the alarm's status, with a voice warning to indicate which type of threat is present; a Hush feature silences nuisance alarms, while the end-of-life alert lets you know when it's time to replace the unit.


Simple installation & operation: Battery-operated unit installs quickly and easily without an electrician; one-button operation to test or silence the alarm.
10-year battery-operated smoke & co alarm: a sealed lithium battery enables the unit to monitor your home 24/7, keeping you and your family safe and sound for up to a decade without frequent battery replacement; a low battery warning indicates the unit is coming to its end of life. 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.


Features an electrochemical carbon monoxide sensing technology as well as an ionization sensor that detects the fine particles of a fast-burning fire.
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. Keep your family safe with this 3-pack of hardwired smoke and carbon monoxide alarm; The battery backup means constant monitoring, even if there's a power failure.

The led indicator flashes every 30 seconds. We will solve the problem as soon as possible to make you have a pleasant shopping experience. Higher safety stability. Once the hazard value reaches the level will emit a sound greater than 85DB to remind you to stay away from the danger.
Very intuitive to see the alarm status. Combined smoke and carbon monoxide alarm detector: both smoke from fire and excessive carbon monoxide threaten our lives. Battery powered: petricor smoke and carbon monoxide alarms are battery powered Not Hardwired. Lcd display and led indicators: the one-touch detection button provides a real-time display of the current smoke and carbon monoxide levels. It can reduce false alarms during actual use and there is no radiation.

A single button makes alarm easy to test monthly or silence during a false alarm. Emits T3 Pattern. Two latching features help indicate a low battery or the originating alarm in a system. Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety.
1. X-Sense
#ad
X-Sense 10-Year Battery Smoke and Carbon Monoxide Alarm with Display, Dual Sensor Smoke CO Alarm Complies with UL 217 & UL 2034 Standards, Auto-Check, SC01, 5-Pack
#adX-Sense #ad - Quick & easy installation with guaranteed quality: requires no rewiring; easy to mount on any wall or ceiling with the included mounting bracket, screws and anchor plugs; certified to meet the UL 217 & UL 2034 safety standards for your peace of mind and absolute confidence in our product. 10-year battery & 10-year sensor: this smoke and carbon monoxide alarm 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; an end-of-life signal will let you know when it's time to replace the unit for safety.Practical lcd display: clearly indicates real-time carbon monoxide co concentration in the surrounding air, the screen will be backlit blue, as well as the remaining battery life and working status of the alarm; if a CO concentration of 30-999 ppm exists for a certain time period, and the LED indicator will flash red 4 times every 5.8
More information #ad
8 seconds. 2-in-1 accurate, and instantly notifies you when dangerous smoke or co concentration is detected while minimizing false alarms; provides the ultimate protection from 2 deadly threats, Reliable & Highly Sensitive Alarm: Equipped with both photoelectric smoke sensor and electrochemical CO sensor that work independently of each other; every second counts; detects both fast and slow-burning fires, all contained in 1 unit. Simple to use: test/silence button enables you to test the alarm weekly, instantly alerting the entire household, an alarm tone of over 85 dB will sound throughout your entire home, and to easily silence the alarm when false alarms occur; malfunction and low battery warnings allow you to easily know the working status of the alarm; in case of an emergency, even those in sleep.
Brand | X-Sense #ad |
Manufacturer | X-Sense #ad |
Height | 2 Inches |
Length | 5.7 Inches |
Weight | 4.54 Pounds |
Width | 5.7 Inches |
Part Number | SC01-1-5 |
Model | SC01 |
Warranty | 60-day money-back guarantee, 5-year quality warranty, and lifetime technical support |
More information #ad
2. Kidde
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Kidde Smoke & Carbon Monoxide Detector, Combination Smoke & CO Alarm, Battery Powered, Voice Alert
#adKidde #ad - Ionization sensor technology - smoke detector detects invisible fire particles, 85 decibel alarm alerts of fire. Test-hush feature - silences the unit for approximately 8 minutes; tamper-resistant technology deters removal of the unit from the wall or ceiling.More information #ad
Protects during a power failure - combo smoke and CO alarm operates on 2-AA batteries. Ul certified, 10-year limited warranty. Fire & co detector in 1 unit with alert modes, "fire! Fire!", LED lights, & voice alarm, that states, "warning! carbon Monoxide!", or "Low Battery!".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
3. Google
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Smoke Alarm, Smoke Detector and Carbon Monoxide Detector, Wired, White, Google Nest Protect
#adGoogle #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. This google product features the Google Seal for Online Marketplace when purchased from a seller other than Amazon.Nest protect tells you where it's hiding. Detects co: carbon monoxide is an invisible poisonous gas. When there’s co, nest Protect tells you where it’s hiding. Field of view 120°. Split-spectrum sensor: in an emergency seconds count. 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.
More information #ad
A light in the dark: usually nest Protect has its light turned off but when you walk underneath it Pathlight can light your way. App silence: nest protect is the first alarm you can hush from your phone. 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. 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. Simply walk to the Nest Protect that noticed the problem and open the Nest app. Wireless: working wi-fi connection: 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. Kidde
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Kidde Smoke & Carbon Monoxide Detector, Hardwired with 10-Year Battery Backup, Voice Warning
#adKidde #ad - Smart interconnect allows you to connect up to 24 Kidde devices, giving you trusted protection throughout your home. Ul certified, 10-year limited warranty.Led lights indicate the alarm's status, with a voice warning to indicate which type of threat is present; a Hush feature silences nuisance alarms, while the end-of-life alert lets you know when it's time to replace the unit.
More information #ad
Intelligent technology – smoke and carbon monoxide detector combines ionization & electrochemical sensors to detect invisible fire particles & CO gas; 85dB alarm and voice warning sound when hazard is detected. Hardwired alarm contains a 10-year tamper proof backup battery to protect your home and family during power outages, eliminates the need for battery replacement.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
5. Kidde
#ad
Pack of 2, Kidde Smoke & Carbon Monoxide Detector, Voice Alert, Hardwired, Interconnect Combination Smoke & CO Alarm with Battery Backup
#adKidde #ad - Fire & co detector in 1 unit with alert modes, led lights, "Warning! Carbon Monoxide!", "Fire! Fire!", & voice alarm, 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.More information #ad
Ul certified, 10-year limited warranty. 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.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
6. X-Sense
#ad
Dual Sensor Smoke and CO Alarm Complies with UL 217 & UL 2034 Standards, Auto-Check, X-Sense 10-Year Battery Smoke and Carbon Monoxide Detector with LCD Display, SC08
#adX-Sense #ad - Faster response to dangers with loud 85 db alarm: gives you the earliest possible warning of smoke and CO threat with both a loud 85 dB alarm and a rapid flashing red LED indicator; this alarm is sure to wake up you and your family, even when sound asleep. Practical lcd display: clearly displays real-time CO levels above 30 ppm parts per million taken from the surrounding air, as well as the status of the alarm’s battery level.Simple installation & operation: Battery-operated unit installs quickly and easily without an electrician; one-button operation to test or silence the alarm.
More information #ad
Protection from two deadly threats: one alarm protects against both dangerous smoke and carbon monoxide CO in the surrounding air; accurately detects CO from any potential sources; upgraded photoelectric and electrochemical sensors significantly increase the alarm’s sensitivity, enabling faster response times. 10-year battery-operated smoke & co alarm: a sealed lithium battery enables the unit to monitor your home 24/7, keeping you and your family safe and sound for up to a decade without frequent battery replacement; a low battery warning indicates the unit is coming to its end of life. 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 |
Model | SC08 |
Warranty | 60-day money-back guarantee, 5-year quality warranty, and lifetime technical support |
More information #ad
7. Kidde
#ad
Voice Alert, Hardwired, Kidde Smoke & Carbon Monoxide Detector, Interconnect Combination Smoke & CO Alarm with Battery Backup
#adKidde #ad - Photoelectric sensor technology - hardwired smoke detector detects visible fire particles, 85 decibel alarm alerts of fire. Fire & co detector in 1 unit with alert modes, & voice alarm, "Warning! Carbon Monoxide!", "Fire! Fire!", LED lights, that states, or "Low Battery!".More information #ad
Ul certified, 10-year limited warranty. Test-hush feature - silences the unit for approximately 8 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 120V power source with 9V front-loading battery backup.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. FIRST ALERT
#ad
White, FIRST ALERT BRK SC9120B-3 Hardwired Smoke and Carbon Monoxide CO Detector with Battery Backup. 3-Pack
#adFIRST ALERT #ad - Can connect to other compatible BRK or First Alert detectors, to ensure all alarms will sound when threat is detected. 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.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
Dust cover. 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. Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home 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. Keep your family safe with this 3-pack of 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 | 2.2 Inches |
Length | 5.6 Inches |
Weight | 0.7 Pounds |
Width | 5.6 Inches |
Part Number | SC9120BFF-3 |
Model | BRK SC9120B-3 |
More information #ad
9. PETRICOR
#ad
PETRICOR Smoke and Carbon Monoxide Alarm Detector with Photoelectric Sensor, LCD Display, Battery Operated. Home Fire & CO Alarms Detector Not Hardwired 1 Pack.
#adPETRICOR #ad - Green light means normal, yellow light means error and red light means alarm. High quality sensors: we use high quality photoelectric sensors and electrochemical carbon monoxide sensors. This product will automatically detect these two harmful substances every 8 seconds.The led indicator flashes every 30 seconds. We will solve the problem as soon as possible to make you have a pleasant shopping experience. Higher safety stability. Once the hazard value reaches the level will emit a sound greater than 85DB to remind you to stay away from the danger.
More information #ad
It can be installed anywhere you need it: living room, bedroom, garage, utility room, basement, or even in your RV or camping. Among them, photoelectric sensing technology is more accurate for visible smoke recognition. Quality service: you have any questions about our fire & CO alarms, feel free to contact us. Very intuitive to see the alarm status. Combined smoke and carbon monoxide alarm detector: both smoke from fire and excessive carbon monoxide threaten our lives. Battery powered: petricor smoke and carbon monoxide alarms are battery powered Not Hardwired. Lcd display and led indicators: the one-touch detection button provides a real-time display of the current smoke and carbon monoxide levels. It can reduce false alarms during actual use and there is no radiation.
Brand | PETRICOR #ad |
Manufacturer | shenzhenshimengqihangkejiyouxiangongsi #ad |
Model | MQ-808 |
More information #ad
10. FIRST ALERT
#ad
1-Pack, First Alert BRK 3120B Hardwired Photoelectric and Ionization Smoke Alarm with Battery Backup, Dual Sensing Smoke Alarm
#adFIRST ALERT #ad - Temperature range: 40°f 4°c to 100°F 38°C. Hardwired alarm includes battery backup for power outages. Optipath 360 patented technology provides 360 degrees of access to the smoke alarm.A single button makes alarm easy to test monthly or silence during a false alarm. Emits T3 Pattern. Two latching features help indicate a low battery or the originating alarm in a system. Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety.
More information #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. Photoelectric and ionization sensors provide comprehensive fire detection. Equipped with a dual photoelectric and ionization smoke sensor to quickly detect both fast burning and smoldering fires.Brand | FIRST ALERT #ad |
Manufacturer | First Alert #ad |
Height | 2.4 Inches |
Length | 5.7 Inches |
Weight | 0.85 Pounds |
Width | 5.7 Inches |
Part Number | 3120FF |
Model | 3120FF |
Warranty | 10 Year Limited |
More information #ad
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