As an Amazon Associate I earn from qualifying purchases.
Kidde is the #1 most installed fire safety brand in North America* - and a trusted leader in fire safety for more than 100 years. Easy & quick installation - plugs into any standard AC wall outlet.

Combination alarm with co readings: the informative LCD will show you the battery level and real-time CO levels in PPM parts per million.
Simple installation: requires no rewiring; easy to mount this smoke and carbon monoxide alarm on any wall or ceiling with the included mounting bracket, screws, and anchor plugs. 10-year battery: the fire and co alarm is built with a sealed lithium battery that provides 10 years of continuous power, saving you from changing batteries and power outage.

Simple to use, with a single test/silence button; A loud 85 decibel alarm sounds when carbon monoxide levels reach dangerous levels.
To ensure complete protection make sure to place one on each level of your home and in each bedroom. Low battery signal mute, quiets low battery signal for up to 8 hours. Item length is 3. 4 inches, item width is 1. 38 inches and item height is 5 inches. 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.

Kidde’s carbon monoxide alarms meet the requirements of Underwriters Laboratories UL, an independent facility that tests products for compliance with widely-accepted safety standards. Gas alarms one second of alarm on, one second of alarm off, repeating with “GAS” shown in display.
Battery backup 9 volt battery included. Digital display and peak level button displays the peak CO level recorded by the alarm since it was last reset. Ul certified, 5-year Limited Warranty. Easy to install co and explosive gas alarm with three convenient mounting options including AC wall outlet, plugin six foot power cord, or table top. Displays CO concentration.


All first alert cO alarms are rigorously tested to meet UL standards.
A loud 85 decibel alarm sounds when Carbon Monoxide levels reach dangerous levels. 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. To ensure complete protection make sure to place one on each level of your home and in each bedroom.

Uses electrochemical carbon monoxide sensor the most accurate technology available. 7 year limited warranty; equipped with end of life signal chirp, so you know when it’s time to replace the unit for safety.

Loud 85-decibel alarm is desiqned to be heard easily. 2-in-1 accurate, 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 firesand instantly notifies you when dangerous smoke or Co concentration is detected while minimizing false alarms; provides the ultimate protection from 2 deadly threats, all contained in 1 unit.
Lcd display: cleary indicates real-time carbon monoxide CO concentration in the surrounding air, as well as the remaining battery life and working status of the alarm. Please kindly press if false alarm. Easy install and use: the alarm can easily install with mounting bracket No hardwired anymore. Test and silence button: tests the unit for proper operation and resets the smoke and carbon monoxide alarm, Alarm Volume:Loud>85dBAat 1 meters.


Carbon monoxide detector features electrochemical sensing technology to detect leaks from multiple sources; smoke alarm uses an ultra-reliable ionization sensor to provide the earliest possible warning of a fast-flaming fire.
This first alert combo pack will help keep you and your family safe; it includes one First Alert carbon monoxide alarm and one First Alert smoke alarm, and both are battery-operated for continuous monitoring, even during a power outage.
1. Kidde
#ad
AC Plug-In with Battery Backup, Kidde Carbon Monoxide Detector, CO Alarm with Replacement Alert
#adKidde #ad - Co detector alerts with a loud 85dB warning signal indicating dangerous levels of carbon monoxide in your home. Ul certified, 10-year limited warranty.Kidde is the #1 most installed fire safety brand in North America* - and a trusted leader in fire safety for more than 100 years. Easy & quick installation - plugs into any standard AC wall outlet.
More information #ad
Purchase multiple alarms for whole-home detection - place 1 carbon monoxide detector on each level of your home & outside each sleeping area to help protect against poisonous CO gas. Plug-in that still works during a power failure - 2-AA batteries included provide backup for your CO alarm in the event of a power outage.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
2. X-Sense
#ad
X-Sense 10-Year Battery Combination Smoke Carbon Monoxide Alarm Detector with Large LCD Display
#adX-Sense #ad - Assured after-sales services: x-sense offers a 60-day money-back guarantee, a 5-year warranty, and lifetime customer support. 2-in-1 protection: the combination smoke and CO detector detects both smoke and carbon monoxide faster and more accurately using a photoelectric smoke sensor and an electrochemical CO sensor.Combination alarm with co readings: the informative LCD will show you the battery level and real-time CO levels in PPM parts per million.
More information #ad
Etl listed: this smoke and carbon monoxide detector has been approved by the ETL and meets UL 217 and UL 2034 safety standards. Simple installation: requires no rewiring; easy to mount this smoke and carbon monoxide alarm on any wall or ceiling with the included mounting bracket, screws, and anchor plugs. 10-year battery: the fire and co alarm is built with a sealed lithium battery that provides 10 years of continuous power, saving you from changing batteries and power outage.
Brand | X-Sense #ad |
Manufacturer | X-Sense #ad |
Height | 2 Inches |
Length | 5.7 Inches |
Width | 5.7 Inches |
Part Number | SC07 |
Model | Smoke and Carbon Monoxide Detector |
Warranty | 60-day money-back guarantee, 5-year quality warranty, and lifetime technical support |
More information #ad
3. FIRST ALERT
#ad
White, First Alert CO605 Plug-In Carbon Monoxide Detector with Battery Backup
#adFIRST ALERT #ad - Keep your family safe with this easy to use plug in carbon monoxide alarm; It works with any standard outlet and also has a battery backup for continuous monitoring of Carbon Monoxide levels, even if there's a power failure. 7 year limited warranty; equipped with end of life signal chirp, so you know when it’s time to replace the unit for safety.Simple to use, with a single test/silence button; A loud 85 decibel alarm sounds when carbon monoxide levels reach dangerous levels.
More information #ad
Features an advanced electrochemical carbon monoxide sensor that accurately detects carbon monoxide levels, no matter where the detector is placed in the room. All first alert co alarms are rigorously tested to meet UL standards. To ensure complete protection make sure to place one on each level of your home and in each bedroom. Low battery signal mute, quiets low battery signal for up to 8 hours. Item length is 3. 4 inches, item width is 1. 38 inches and item height is 5 inches. 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 | 5 Inches |
Length | 3.4 Inches |
Weight | 0.26 Pounds |
Width | 1.38 Inches |
Part Number | FATCO605 |
Model | CO605 |
More information #ad
4. Kidde
#ad
Natural, White, Kidde Nighthawk Carbon Monoxide Detector & Propane, & Explosive Gas Detector, AC-Plug-In with Battery Backup, Digital Display
#adKidde #ad - Carbon monoxide co alarms four quick beeps, followed by five seconds of silence, followed by four quick beeps. Two alarms in one detects carbon monoxide and explosive gas. Three convenient mounting options.Kidde’s carbon monoxide alarms meet the requirements of Underwriters Laboratories UL, an independent facility that tests products for compliance with widely-accepted safety standards. Gas alarms one second of alarm on, one second of alarm off, repeating with “GAS” shown in display.
More information #ad
Low battery warning feature indicates when the battery needs replacement. Loud pulsing alarm that will sound to alert you to a potential problem. Battery backup 9 volt battery included. Digital display and peak level button displays the peak CO level recorded by the alarm since it was last reset. Ul certified, 5-year Limited Warranty. Easy to install co and explosive gas alarm with three convenient mounting options including AC wall outlet, plugin six foot power cord, or table top. Displays CO concentration.
Brand | Kidde #ad |
Manufacturer | Kidde #ad |
Height | 11 Inches |
Length | 2 Inches |
Weight | 1 Pounds |
Width | 8 Inches |
Part Number | KI-21006677 |
Model | KN-COEG-3 |
Warranty | 5 Year Limited |
More information #ad
5. Kidde
#ad
Kidde Nighthawk Carbon Monoxide Detector, AC-Plug-In with Battery Backup, Digital Display
#adKidde #ad - Easy installation - plug can be installed in any outlet of your home; or use the attached extension cord to place on a table or shelf. Electrochemical sensing technology - CO alarm detects the presence of carbon monoxide gas, 85 decibel alarm & memory storage.More information #ad
Ul certified, 10-year limited warranty. Protects during a power failure - carbon monoxide alarm contains a 9V battery backup in case of plug-in failure. Peace of mind - when co detection is normal, a red dot appears in the lower right corner & blinks; includes a test button.Brand | Kidde #ad |
Manufacturer | Kidde #ad |
Height | 1.75 inches |
Length | 6.06 inches |
Weight | 3 Pounds |
Width | 3.75 inches |
Part Number | 900-0076 |
Model | KN-COPP-3 |
Warranty | 10 Year Limited |
More information #ad
6. FIRST ALERT
#ad
First Alert CO615 Plug-in Alarm with Battery Backup and Digital Display 1 Pack, White
#adFIRST ALERT #ad - 7 year limited warranty; equipped with end of life signal chirp, so you know when it’s time to replace the unit for safety. Keep your family safe with this digital display, plug in carbon monoxide alarm; It works with any standard outlet and also has a battery backup for continuous monitoring of Carbon Monoxide levels, even if there's a power failure.All first alert cO alarms are rigorously tested to meet UL standards.
More information #ad
Features an advanced electrochemical carbon monoxide sensor; Peak level feature displays the highest concentration of carbon monoxide measured. A loud 85 decibel alarm sounds when Carbon Monoxide levels reach dangerous levels. 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. To ensure complete protection make sure to place one on each level of your home and in each bedroom.
Brand | FIRST ALERT #ad |
Manufacturer | First Alert #ad |
Height | 5 Inches |
Length | 3.4 Inches |
Weight | 0.6 Pounds |
Width | 1.7 Inches |
Part Number | FATCO615 |
Model | CO615 |
Warranty | 7-year Limited Warranty |
More information #ad
7. FIRST ALERT
#ad
First Alert CO600 Plug-In Carbon Monoxide Detector
#adFIRST ALERT #ad - 120 volt ac plug in carbon monoxide alarm. Features an advanced electrochemical carbon monoxide sensor that accurately detects carbon monoxide levels, no matter where the detector is placed in the room.Uses electrochemical carbon monoxide sensor the most accurate technology available. 7 year limited warranty; equipped with end of life signal chirp, so you know when it’s time to replace the unit for safety.
More information #ad
Keep your family safe with this easy to use plug in carbon monoxide alarm; It works with any standard outlet. To ensure complete protection make sure to place 1 on each level of your home and in each bedroom. End of life timer; 7 year limited warranty. A loud 85 decibel alarm sounds when carbon monoxide levels reach dangerous levels.Brand | FIRST ALERT #ad |
Manufacturer | First Alert #ad |
Height | 2.8 Inches |
Length | 8.5 Inches |
Weight | 0.3 Pounds |
Width | 6.75 Inches |
Part Number | CO600 |
Model | FATCO600 |
More information #ad
8. Lecoolife
#ad
3 Pack Combination Photoelectric Smoke Alarm and Carbon Monoxide Detector Battery Operated with Digital Display White
#adLecoolife #ad - Safety and 5 year warranty: low battery signal alarm and "end of life warning ensures the detector can work normal Environment friendly, without smell, radiation or harm. Very convenient to install at home or bedroom - wall mount, screws included.Loud 85-decibel alarm is desiqned to be heard easily. 2-in-1 accurate, 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 firesand instantly notifies you when dangerous smoke or Co concentration is detected while minimizing false alarms; provides the ultimate protection from 2 deadly threats, all contained in 1 unit.
More information #ad
Lcd display: cleary indicates real-time carbon monoxide CO concentration in the surrounding air, as well as the remaining battery life and working status of the alarm. Please kindly press if false alarm. Easy install and use: the alarm can easily install with mounting bracket No hardwired anymore. Test and silence button: tests the unit for proper operation and resets the smoke and carbon monoxide alarm, Alarm Volume:Loud>85dBAat 1 meters.
Brand | Lecoolife #ad |
Manufacturer | Lecoolife #ad |
Model | GS811-A |
More information #ad
9. Kidde
#ad
Pack of 2, Digital Display, Kidde Nighthawk Carbon Monoxide Detector, AC-Plug-In with Battery Backup
#adKidde #ad - When co detection is normal, a red dot appears in the lower right corner & blinks; includes a test button that also resets the CO detector. Ul certified, 10-year limited warranty. Plug-in carbon monoxide detector can be installed in any outlet of your home; use the attached extension cord to place on a table or shelf.More information #ad
Digital display shows the level of carbon monoxide the CO alarm is sensing, updated every 15 seconds. Includes 2 kidde Nighthawk Carbon Monoxide Detectors. Still works during a power failure - carbon monoxide alarm contains a 9V battery backup in case of plug-in failure.Brand | Kidde #ad |
Manufacturer | Kidde #ad |
Height | 6.06 Inches |
Length | 2 Inches |
Weight | 1 Pounds |
Width | 1.75 Inches |
Part Number | 900-0076 |
Model | KN-COPP-3 |
Warranty | 10 year limited manufacturer |
More information #ad
10. FIRST ALERT
#ad
RED, First Alert 1039879 Smoke Alarm and Carbon Monoxide Detector
#adFIRST ALERT #ad - To ensure complete protection make sure to place one carbon monoxide detector on each level of your home and in each bedroom. Both the smoke alarm and carbon monoxide detector feature a loud 85-decibel alarm, and an end-of-life signal so you know when to replace the unit; each unit operates with one 9-volt battery, a single test/silence button, and is UL listed.Carbon monoxide detector features electrochemical sensing technology to detect leaks from multiple sources; smoke alarm uses an ultra-reliable ionization sensor to provide the earliest possible warning of a fast-flaming fire.
More information #ad
Smoke alarm features a low battery alert, a blinking power indicator, a side battery drawer that slides open for easy battery replacement, a missing battery guard, and an optional pin to lock the battery and unit in place for tamper resistance, plus offers a 10 year limited ; carbon monoxide detector offers a 5 year limited. This first alert combo pack will help keep you and your family safe; it includes one First Alert carbon monoxide alarm and one First Alert smoke alarm, and both are battery-operated for continuous monitoring, even during a power outage.
Brand | FIRST ALERT #ad |
Manufacturer | First Alert / BRK Brands, Inc. #ad |
Height | 8.5 inches |
Length | 7 inches |
Weight | 0.9 Pounds |
Width | 2.5 inches |
Part Number | 1039879 |
Model | 1039879 |
Warranty | 10 YEARS |
More information #ad