As an Amazon Associate I earn from qualifying purchases.
All first alert co alarms are rigorously tested to meet UL standards. Features an advanced electrochemical carbon monoxide sensor that accurately detects carbon monoxide levels, no matter where the detector is placed in the room.
To ensure complete protection make sure to place one on each level of your home and in each bedroom. Keep your family safe from carbon monoxide in multiple rooms with this convenient plug in carbon monoxide alarm 3 pack; the alarms work with any standard outlet and also have a battery backup for continuous monitoring of CO levels, even if there's a power failure.

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. 5 year limited warranty; equipped with end of life signal chirp, so you know when it’s time to replace the unit for safety.


2 aa batteries included. Photoelectric smoke sensor helps reduce false alarms caused by cooking or shower steam. Electrochemical carbon monoxide sensor offers advanced detection technology.
Unit uses wireless z wave technology to send mobile alerts if the alarm goes off, so you are aware whether you're at home or away. Includes an 85 decibel horn, side access to a tamper resistant battery door, single test/silence button, and pins that lock the alarm to the mounting bracket.7 year limited warranty; meets UL217 & UL2034 standards. Help keep your family safe with this battery powered smoke and carbon monoxide detector alarm.

To ensure complete protection make sure to place one on each level of your home and in each bedroom. 7-year limited warranty; equipped with end-of-life signal chirp, so you know when it’s time to replace the unit for safety.
Features an advanced electrochemical carbon monoxide sensor; Peak Level feature displays the highest concentration of carbon monoxide measured.

7 year limited warranty; equipped with end of life signal chirp, so you know when it’s time to replace the unit for safety.
Features an advanced electrochemical carbon monoxide sensor; Peak Level feature displays the highest concentration of carbon monoxide measured. Keep your family safe with this easy to use digital display, battery operated carbon monoxide alarm; battery powered alarms provide continuous monitoring of CO levels, even if there's a power failure.

Rigorously tested to meet UL standards. 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.
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. S. 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.


About safe and sound:first alert introduces onelink safe and sound, Apple HomeKit compatible hardwired photoelectric smoke and electrochemical carbon monoxide alarm, featuring a state of the art, an Alexa enabled, omni directional speaker backed by First Alert’s unparalleled reliability and equipped with the power of Alexa.
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. No more confusing beeps:track battery levels in the app and optimize safety by knowing when it’s time to replace them. Voice alerts:key voice location technology announces the type and location of the danger in your home, keeping your entire home safe and connected during an emergency. Safe & sound supports AirPlay 2 and requires iOS 12.

Intuitive latching alarm feature remembers which unit initiated an alarm, while the low battery latch gives a visual indication unit is in low battery condition. Spread spectrum horn is a lower frequencies horn that make it easier for the elderly with normal Aged Related hearing loss to hear the horn.
1. FIRST ALERT
#ad
CO605, 3-Pack, First Alert Plug-In Carbon Monoxide Detector with Battery Backup
#adFIRST ALERT #ad - Simple to use, with a single test/silence button; a loud 85 decibel alarm sounds when Carbon Monoxide levels reach dangerous levels. 7 year limited warranty; equipped with end of life signal chirp, so you know when it’s time to replace the unit for safety.All first alert co alarms are rigorously tested to meet UL standards. Features an advanced electrochemical carbon monoxide sensor that accurately detects carbon monoxide levels, no matter where the detector is placed in the room.
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. To ensure complete protection make sure to place one on each level of your home and in each bedroom. Keep your family safe from carbon monoxide in multiple rooms with this convenient plug in carbon monoxide alarm 3 pack; the alarms work with any standard outlet and also have a battery backup for continuous monitoring of CO levels, even if there's a power failure.
Brand | FIRST ALERT #ad |
Manufacturer | First Alert / BRK Brands, Inc. #ad |
Height | 9 Inches |
Length | 6.75 Inches |
Width | 6.9 Inches |
Part Number | CO605 |
Model | CO605 |
Warranty | 7 Year Limited |
More information #ad
2. FIRST ALERT
#ad
White, First Alert CO400 Carbon Monoxide Detector, Pack of 1
#adFIRST ALERT #ad - Keep your family safe with this easy to use, battery operated carbon monoxide alarm; Battery powered alarms provide continuous monitoring of CO levels, even if there's a power failure.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. 5 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
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. Features an advanced electrochemical carbon monoxide sensor that accurately detects carbon monoxide levels, no matter where the detector is placed in the room.Brand | FIRST ALERT #ad |
Manufacturer | First Alert #ad |
Height | 3 Inches |
Length | 5 Inches |
Weight | 0.45 Pounds |
Width | 1 Inches |
Part Number | CO400 |
Model | CO400FF |
Warranty | 7 Year Warranty |
More information #ad
3. Kidde
#ad
White, Kidde Carbon Monoxide Detector Alarm | AC Powered with Battery Back-up | Model KN-COB-DP2, 6
#adKidde #ad - End of life alarm : alerts user to replace CO alarm after 10-years of operation. Tamper resist feature – can be activated to cause unit to go into alarm if it has been unplugged or has come loose from the outlet.More information #ad
Two led’s : red - illuminates when in alarm mode. Test/reset button : tests CO alarm circuit operation and allows you to immediately silence the alarm. Green – ac power is present, normal operation. Provides peace of mind against the silent killer; Temperature Range: 40˚F 4. 4˚c to 100˚f 37. 8˚c.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
4. FIRST ALERT
#ad
First Alert ZCOMBO 2-in-1 Smoke Detector & Carbon Monoxide Alarm, Z-Wave Combo
#adFIRST ALERT #ad - Certified to work with smart home systems such as ring alarm security system, Samsung Smart things, and Nexia Home Intelligence when connected to a Z wave gateway hub sold separately; consult hub manufacturer to ensure compatibility with this first alert device; not compatible with wink or Onelink.2 aa batteries included. Photoelectric smoke sensor helps reduce false alarms caused by cooking or shower steam. Electrochemical carbon monoxide sensor offers advanced detection technology.
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. Unit uses wireless z wave technology to send mobile alerts if the alarm goes off, so you are aware whether you're at home or away. Includes an 85 decibel horn, side access to a tamper resistant battery door, single test/silence button, and pins that lock the alarm to the mounting bracket.7 year limited warranty; meets UL217 & UL2034 standards. Help keep your family safe with this battery powered smoke and carbon monoxide detector alarm.
Brand | FIRST ALERT #ad |
Manufacturer | First Alert #ad |
Height | 2.5 Inches |
Length | 8 Inches |
Weight | 0.69 Pounds |
Width | 7 Inches |
Part Number | ZCOMBO |
Model | ZCOMBO |
Warranty | 7 year manufacturer warranty |
More information #ad
5. FIRST ALERT
#ad
3-Pack, First Alert Dual-Power Plug-In Carbon Monoxide Detector with Battery Backup and Digital Display, CO615
#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. 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. 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
All first alert co alarms are rigorously tested to meet UL standards. Keep your family safe from carbon monoxide in multiple rooms with this convenient plug-in carbon monoxide alarm 3-pack; the backlit digital-display alarms work with any standard outlet and also have a battery backup for continuous monitoring of Carbon Monoxide levels, even if there's a power failure. Features an advanced electrochemical carbon monoxide sensor; Peak Level feature displays the highest concentration of carbon monoxide measured.
Brand | FIRST ALERT #ad |
Manufacturer | First Alert / BRK Brands, Inc. #ad |
Height | 9 Inches |
Length | 6.75 Inches |
Weight | 0.01 Pounds |
Width | 8.9 Inches |
Part Number | CO615 |
Model | CO615 |
Warranty | 7 Year Limited |
More information #ad
6. FIRST ALERT
#ad
First Alert Carbon Monoxide Detector Alarm|No Outlet Required with Digital Display and Peak Memory, CO410, Battery Operated
#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. A loud 85 decibel alarm sounds when Carbon Monoxide levels reach dangerous levels.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
To ensure complete protection make sure to place one on each level of your home and in each bedroom. All first alert co alarms are rigorously tested to meet UL standards. Features an advanced electrochemical carbon monoxide sensor; Peak Level feature displays the highest concentration of carbon monoxide measured. Keep your family safe with this easy to use digital display, battery operated carbon monoxide alarm; battery powered alarms provide continuous monitoring of CO levels, even if there's a power failure.
Brand | FIRST ALERT #ad |
Manufacturer | First Alert #ad |
Height | 8.5 Inches |
Length | 2.25 Inches |
Weight | 0.58 Pounds |
Width | 7 Inches |
Part Number | CO410 |
Model | CO410 |
More information #ad
7. First Alert
#ad
First Alert Smoke Detector and Carbon Monoxide Detector Alarm with Built-In 10-Year Battery, BRK PRC710
#adFirst Alert #ad - A loud 85 decibel alarm sounds when Carbon Monoxide, and Smoke levels begin to rise. Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety. Complies with all current 10 year legislation in U.Rigorously tested to meet UL standards. 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.
More information #ad
States/cities where required. Features a sleek, low profile design to blend more fully into the wall and out of sight. 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. S. 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.
Brand | First Alert #ad |
Manufacturer | First Alert #ad |
Height | 0.96 Inches |
Length | 4.92 Inches |
Weight | 0.6 Pounds |
Width | 4.92 Inches |
Part Number | PRC710 |
Model | PRC710 |
More information #ad
8. Kidde
#ad
Kidde KN-COB-B-LPM Battery Operated Carbon Monoxide Alarm
#adKidde #ad - Use to help provide continuous monitoring of carbon monoxide levels. Piezoelectric horn is rated at 85 dB at 10 ft. Alarm will not sound if carbon monoxide levels are below 30 PPM.More information #ad
Brand | Kidde #ad |
Manufacturer | Kidde #ad |
Height | 7.1 Inches |
Length | 2.6 Inches |
Weight | 0 Pounds |
Width | 11.1 Inches |
Part Number | KN-COB-B-LPM |
Model | KN-COB-B-LPM |
More information #ad
9. FIRST ALERT
#ad
Alexa Enabled Smoke Detector and Carbon Monoxide Detector Alarm with Premium Home Speaker | Onelink Safe & Sound by First Alert
#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. 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.About safe and sound:first alert introduces onelink safe and sound, Apple HomeKit compatible hardwired photoelectric smoke and electrochemical carbon monoxide alarm, featuring a state of the art, an Alexa enabled, omni directional speaker backed by First Alert’s unparalleled reliability and equipped with the power of Alexa.
More information #ad
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, and more, control smart home devices, fill you in on the news, Pandora, and ask it to play music or podcasts from Music, check weather, read audiobooks, and more; plus Alexa’s always adding skills, Spotify, 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. No more confusing beeps:track battery levels in the app and optimize safety by knowing when it’s time to replace them. Voice alerts:key voice location technology announces the type and location of the danger in your home, keeping your entire home safe and connected during an emergency. Safe & sound supports AirPlay 2 and requires iOS 12.
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 Years |
More information #ad
10. FIRST ALERT
#ad
First Alert BRK SC7010B-3 Hardwired Smoke and Carbon Monoxide CO Detector with Battery Backup, 3-Pack
#adFIRST ALERT #ad - 3 pack of 120-volt hardwired combination photoelectric smoke and electrochemical Carbon monoxide alarms with battery backup.Intuitive latching alarm feature remembers which unit initiated an alarm, while the low battery latch gives a visual indication unit is in low battery condition. Spread spectrum horn is a lower frequencies horn that make it easier for the elderly with normal Aged Related hearing loss to hear the horn.
More information #ad
Features convenient 2-aA battery backup, dust cover, silence/test button, 85-decibel alarm. Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety.Brand | FIRST ALERT #ad |
Manufacturer | First Alert #ad |
Height | 2 Inches |
Length | 5 Inches |
Weight | 0.74 Pounds |
Width | 5 Inches |
Part Number | SC7010BFF-3 |
Model | BRK SC7010B-3 |
More information #ad