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All first alert cO 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.
A loud 85-decibel alarm sounds when CO levels reach dangerous levels. Easy-to-read backlit digital display shows temperature and CO concentration; Peak Level feature displays the highest concentration of carbon monoxide measured.

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.
Pls kindly press if false alarm. If any problem, contact with us without hesitation, we will reply to you asap. No hardwired anymore, very convenient to install at home or bedroom - wall mount, screws included. Loud 85-decibel alarm is designed to be heard easily. Environment friendly, without smell, radiation or harm. Easy install and use: the alarm can easily install with mounting bracket.

Self activation – Alarm automatically activates when attached to the mounting bracket. Test/reset button – tests the unit for proper operation.
The carbon monoxide alarm pattern is 4 short beeps, followed by 5 seconds of silence, followed by 4 short beeps with a corresponding red Led flash. Eliminates worry about battery removal or unauthorized deactivation of alarm. Red led when a dangerous level of carbon monoxide is detected the red Led will pulse and a loud alarm pattern will sound. Led - green led flashes every 30 seconds to indicate the unit is operating properly.




10 year battery operated: this combination smoke detector and carbon monoxide detector alarm provides 10 years of continuous power with a built-in lithium battery; provides continuous monitoring of smoke and CO levels, even if there's a power failure; an end-of-life signal will let you know when it’s time to replace the unit for safety.
It can keep you and your family safe at any time. Low battery signal: low battery voltage signal and end of life warning ensures the co detector can work normal. Test/slience button: tests the unit for proper operation and resets the carbon monoxide alarm, Alarm.

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.
Complies with all current 10 year legislation in U. S. A loud 85 decibel alarm sounds when Carbon Monoxide, and Smoke levels begin to rise. States/cities where required. Rigorously tested to meet UL standards. Features a sleek, low profile design to blend more fully into the wall and out of sight.

10-year battery: provides 10 years of continuous power with a built-in lithium battery; saves you from battery replacement.
1. Kidde
#ad
Kidde Smoke & Carbon Monoxide Detector, Battery Powered, Combination Smoke & CO Alarm, Voice Alert
#adKidde #ad - Ul certified, 10-year limited warranty. Fire & co detector in 1 unit with alert modes, & voice alarm, that states, "Fire Fire", LED lights, "Warning Carbon Monoxide", 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.More information #ad
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 at 10 feet.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 | 21026043 |
Warranty | 5-year limited warranty |
More information #ad
2. FIRST ALERT
#ad
First Alert CO710 Carbon Monoxide Detector with 10-Year Battery and Digital Temperature Display
#adFIRST ALERT #ad - 10-year limited warranty; equipped with end-of-life signal chirp, so you know when it’s time to replace the unit for safety. Built-in 10-year lithium battery offers continuous protection for the life of the carbon monoxide detector.All first alert cO 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.
More information #ad
Keep your family safe with this easy to use digital-display, 10-year battery operated carbon monoxide alarm; Battery powered alarms provide continuous monitoring of CO levels, even if there's a power failure. A loud 85-decibel alarm sounds when CO levels reach dangerous levels. Easy-to-read backlit digital display shows temperature and CO concentration; Peak Level feature displays the highest concentration of carbon monoxide measured.
Brand | FIRST ALERT #ad |
Manufacturer | First Alert / BRK Brands, Inc. #ad |
Height | 2.63 Inches |
Length | 0.94 Inches |
Weight | 0.5 Pounds |
Width | 4.75 Inches |
Part Number | CO710 |
Model | CO710 |
More information #ad
3. Lecoolife
#ad
Portable Fire Co Alarm for Home and Kitchen, 10 Year Battery Operated Smoke and Carbon Monoxide Detector
#adLecoolife #ad - Test/silence button: tests the unit for proper operation and resets the smoke and carbon monoxide alarm, Alarm Volume: Loud > 85dBA at 1 meters. Safety and 5 year warranty: low battery signal alarm and "end of life"warning ensures the detector can work normal.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.
More information #ad
Lcd display: clearly indicates real-time carbon monoxide CO concentration in the surrounding air, as well as the remaining battery life and working status of the alarm. Pls kindly press if false alarm. If any problem, contact with us without hesitation, we will reply to you asap. No hardwired anymore, very convenient to install at home or bedroom - wall mount, screws included. Loud 85-decibel alarm is designed to be heard easily. Environment friendly, without smell, radiation or harm. Easy install and use: the alarm can easily install with mounting bracket.
Brand | Lecoolife #ad |
Manufacturer | Lecoolife #ad |
Model | GS811-A |
More information #ad
4. Kidde
#ad
Kidde Worry-Free Carbon Monoxide Detector Alarm with 10 Year Sealed Battery | Model C3010
#adKidde #ad - One quick beep every 60 seconds is an indication of low battery power. Amber led flashes every second to indicate the unit is in fault mode. This cycle will continue for 4 minutes and then change to 2 patterns once a minute there after. Sealed-in lithium battery – sealed-in lithium power supply; no battery replacement required over the 10 year life of the alarm.Self activation – Alarm automatically activates when attached to the mounting bracket. Test/reset button – tests the unit for proper operation.
More information #ad
Resets the Carbon Monoxide Alarm. One quick beep every 30 seconds alerts the unit is in error condition. Event memory – red led flashes every 60 seconds to alert that a high level of carbon monoxide has been detected within the last 14 days. The carbon monoxide alarm pattern is 4 short beeps, followed by 5 seconds of silence, followed by 4 short beeps with a corresponding red Led flash. Eliminates worry about battery removal or unauthorized deactivation of alarm. Red led when a dangerous level of carbon monoxide is detected the red Led will pulse and a loud alarm pattern will sound. Led - green led flashes every 30 seconds to indicate the unit is operating properly.
Brand | Kidde #ad |
Manufacturer | Kidde #ad |
Height | 2.75 Inches |
Length | 4.5 Inches |
Weight | 0.48 Pounds |
Width | 1.5 Inches |
Part Number | 21010045 |
Model | 21010045 |
Warranty | 10 year limited warranty |
More information #ad
5. Kidde
#ad
Plug In with Battery Backup, Kidde Carbon Monoxide Detector, CO Detector, KN-COP-DP2
#adKidde #ad - Protects during a power failure - 2-AA batteries, included with pack, provide backup service in the event of a power outage. Easy & quick installation - plugs directly into your home's standard wall outlet, 85 decibel alarm alerts of fire.More information #ad
Ul certified, 10-year limited warranty. Co detector that alerts with a warning signal against dangerous levels of carbon monoxide in your home. Whole home family protection - place 1 carbon monoxide detector on each level of your home & in your bedroom to protect from poisonous gases.Brand | Kidde #ad |
Manufacturer | Kidde #ad |
Height | 4.5 Inches |
Length | 2.75 Inches |
Weight | 0.04 Pounds |
Width | 1.5 Inches |
Part Number | 900-0263 |
Model | KN-COB-DP2 |
More information #ad
6. Kidde
#ad
CO Alarm, Battery Powered with LED Lights, Kidde Carbon Monoxide Detector
#adKidde #ad - Ul certified, 10-year limited warranty. Sophisticated electronic components to protect you & your family from the dangers of carbon monoxide, 85 decibel alarm alerts of fire. Whole home family protection - place 1 carbon monoxide detector on each level of your home & in your bedroom to protect from poisonous gases.More information #ad
Protects during a power failure - operates on 2-AA batteries, included with pack. Co detector with alert modes & LED lights that pulse for power, CO detection, & low battery.Brand | Kidde #ad |
Manufacturer | Kidde #ad |
Height | 11 Inches |
Length | 3 Inches |
Weight | 0.5 Pounds |
Width | 7 Inches |
Part Number | KN-COB-LP2 9CO5-LP2 |
Model | KN-COB-LP2 9CO5-LP2 |
Warranty | 10-Year warranty: Consult User Guide for more information. |
More information #ad
7. Kidde
#ad
Kidde Carbon Monoxide Detector with Digital Display & LED Lights, CO Alarm
#adKidde #ad - Easy to read digital display - allows for easy viewing of carbon monoxide levels. Protects during a power failure - CO detector operates on 3-AA batteries. Co detector with alert modes & 2 LED lights that pulse for power & CO detection.More information #ad
Ul certified, 10-year limited warranty. Electrochemical sensing technology - CO alarm detects the presence of carbon monoxide gas, 85 decibel alarm.Brand | Kidde #ad |
Manufacturer | Kidde Safety #ad |
Height | 2.75 Inches |
Length | 4.5 Inches |
Weight | 0.01 Pounds |
Width | 1.5 Inches |
Part Number | 21008873 |
Model | KN-COPP-B-LPM |
Warranty | 10 Year Limited |
More information #ad
8. Elvicto
#ad
3 Pack 10 Year Battery Operated Smoke Detector and Carbon Monoxide Detector, Travel Portable Photoelectric Fire Co Alarm for Home, Kitchen
#adElvicto #ad - No hardwired anymore. Environment friendly, without smell, radiation or harm. A loud 85-decibel alarm sounds when carbon monoxide, and Smoke levels begin to rise, Easy to Install and Use: The alarm can easily install with mounting bracket.10 year battery operated: this combination smoke detector and carbon monoxide detector alarm provides 10 years of continuous power with a built-in lithium battery; provides continuous monitoring of smoke and CO levels, even if there's a power failure; an end-of-life signal will let you know when it’s time to replace the unit for safety.
More information #ad
Combo smoke and co detecor: features electrochemical Carbon Monoxide sensing technology and photoelectric smoke sensor optimized to detect larger smoke particles produced by smoldering fires; helps minimize the number of false alarms. It can keep you and your family safe at any time. Low battery signal: low battery voltage signal and end of life warning ensures the co detector can work normal. Test/slience button: tests the unit for proper operation and resets the carbon monoxide alarm, Alarm.
Brand | Elvicto #ad |
Manufacturer | Elvicto #ad |
Model | GS811-A |
More information #ad
9. First Alert
#ad
First Alert BRK PRC710 Smoke and Carbon Monoxide Alarm with Built-In 10-Year Battery , White
#adFirst Alert #ad - Features electrochemical carbon Monoxide sensing technology and photoelectric smoke sensor optimized to detect larger smoke particles produced by smoldering fires; helps minimize the number of false alarms.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.
More information #ad
10-year limited ; equipped with end-of-life signal chirp, so you know when it’s time to replace the unit for your safety the date printed on the item is the manufacturing date, not the expiration date. Complies with all current 10 year legislation in U. S. A loud 85 decibel alarm sounds when Carbon Monoxide, and Smoke levels begin to rise. States/cities where required. Rigorously tested to meet UL standards. Features a sleek, low profile design to blend more fully into the wall and out of sight.
Brand | First Alert #ad |
Manufacturer | First Alert #ad |
Height | 0.96 Inches |
Length | 4.92 Inches |
Weight | 1.4 Pounds |
Width | 4.92 Inches |
Part Number | PRC710 |
Model | PRC710 |
More information #ad
10. X-Sense
#ad
X-Sense 10 Year Battery Not Hardwired Smoke and Carbon Monoxide Detector with LCD Display, SC01, Auto-Check, Dual Sensor Smoke CO Alarm Complies with UL 217 & UL 2034 Standards
#adX-Sense #ad - 2-in-1 protection: equipped with both photoelectric smoke sensor and electrochemical CO sensor that both detect smoke and dangerous CO levels. Informative lcd: clearly indicates real-time carbon monoxide CO levels in the surrounding air, as well as its battery level and working status.10-year battery: provides 10 years of continuous power with a built-in lithium battery; saves you from battery replacement.
More information #ad
Assured quality: we offer a 60-day money-back guarantee, a 5-year warranty, and lifetime customer support. Simple installation: requires no rewiring; easy to mount on any wall or ceiling with the included mounting bracket, screws and anchor plugs. Etl certified: meets the ul 217 & ul 2034 safety standards for your peace of mind and absolute confidence in our product.Brand | X-Sense #ad |
Manufacturer | X-Sense #ad |
Height | 2 Inches |
Length | 5.7 Inches |
Weight | 0.69 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