Baby Stuff Lab compares top-rated Kidde Carbon Monoxide Alarm Kn Cob B by analyzing reviews and customer feedback. You can easily choose the right one from our Editor Pick List.
Top Rated Kidde Carbon Monoxide Alarm Kn Cob B
Save $21.90No. 1 
Kidde KN-COB-B-LP Nighthawk Carbon Monoxide Alarm, Battery Operated - 21007268
- Battery operated (three AAs included) to provide protection during power outages
- Test-reset button tests the unit for proper operation and resets the carbon monoxide alarm
- Forty percent longer life than other CO alarms
- Seven-year end-of-life warning alerts user to replace CO alarm
- Meets the requirements of Underwriters Laboratories (UL)
No. 2 
Kidde Carbon Monoxide Detector, AA Battery Powered CO Alarm with LEDs, Test-Reset Button, Low Battery Indicator, Portable
- Electrochemical sensor technology detects CO gas
- Easy installation, no wiring needed, detects during a power failure by operating on 2-AA batteries (included)
- Conveniently designed & portable: simple to install on a wall of your home or place on a tabletop
- Green LED indicates power to the smoke detector, while an 85-decibel alarm & a red LED indicates the presence of carbon monoxide
- Peak Level Memory records the last time carbon monoxide was detected or when the unit was last tested
No. 3 
Kidde Carbon Monoxide Detector, Battery Powered CO Alarm with LEDs, Test-Reset Button, Low Battery Indicator, Portable
- Electrochemical sensor technology detects CO gas
- Easy installation, no wiring needed, detects during a power failure by operating on 2-AA batteries (included); Install on a wall of your home or place on a tabletop
- Easy to take along for hotel and vacation rental monitoring
- Green LED indicates power to the carbon monoxide detector, while an 85-decibel alarm & a red LED indicates the presence of carbon monoxide
- Event Memory records the last time carbon monoxide was detected or when the unit was last tested
Save $20.28No. 4 
Kidde Hardwired Carbon Monoxide Detector with 9-Volt Battery Backup, 3 LED Indicators
- Electrochemical sensor technology detects CO gas
- Carbon monoxide alarm operates on a 120V wired power source with a 9-Volt alkaline battery backup (included)
- An 85-decibel alarm sounds & a red LED indicates the CO detector is sensing poisonous carbon monoxide gas
- Green LED indicates power to the carbon monoxide detector, while an 85-decibel alarm & a red LED indicates the presence of carbon monoxide
- Interconnection capability: allows you to connect up to 24 Kidde smoke, heat, or CO alarms, with the possibly it interconnect 6 strobe lights or relay modules
Save $13.50No. 5 
Kidde Carbon Monoxide Detector, Plug In Wall with AA Battery Backup, Test-Hush Button
- Easy Installation - simply plug-in to a standard, 120V outlet in your home
- 2-AA battery backup provides protection during a power outage
- 85-decibel alarm announces when carbon monoxide is detected
- Peak Level Memory records the last time carbon monoxide was detected or when the unit was last tested
- Test-Hush Button makes testing the detector or silencing false alarms easy
Save $27.99No. 6 
Kidde Carbon Monoxide Detector, Battery Powered CO Alarm with LEDs, Test-Reset Button, Low Battery Indicator, Portable, 6 Pack
- Electrochemical sensor technology detects CO gas
- Easy installation, no wiring needed, detects during a power failure by operating on 2-AA batteries (included); Install on a wall of your home or place on a tabletop
- Easy to take along for hotel and vacation rental monitoring
- Green LED indicates power to the carbon monoxide detector, while an 85-decibel alarm & a red LED indicates the presence of carbon monoxide
- Event Memory records the last time carbon monoxide was detected or when the unit was last tested
Save $3.98No. 7 
Kidde Hardwired Carbon Monoxide Detector with 9-Volt Battery Backup, Digital LED Display 5.75 diameter x 1.8 depth
- Carbon monoxide alarm operates on a 120V wired power source with a 9-Volt alkaline battery (included)
- Digital LED display shows the level of carbon monoxide the CO alarm is sensing
- 85-decibel alarm announces when carbon monoxide is detected
- Peak Level Memory records the last time carbon monoxide was detected or when the unit was last tested
- Test-Hush Button makes testing the detector or silencing false alarms easy
No. 8 
Kidde Smoke & Carbon Monoxide Detector, 10-Year Battery Powered, LED Warning Light Indicators
- 2-IN-1 DETECTION: Alerts you to both smoke and carbon monoxide (CO) using a single, cost-effective device.
- NEVER-CHANGE 10-YEAR BATTERY: No low battery chirps or battery changes for 10 years and saves up to $40 over the life of the detector. (10-yr limited warranty on alarm, not a battery performance...
- ENHANCED SENSING TECHNOLOGY: Reduces false smoke alarms often caused by cooking. Comprehensively tested to meet the latest UL standards, meets UL 217 9th Edition, UL 2034 4th Edition, and FCC...
- SELF-TESTING ALARM: Internal components ensure alarm is always operating as expected. Not a substitute for a manual push test, perform a button test once per week to verify alarm operation.
- 3 LED NOTIFICATIONS: LED lights indicate alarm status, green = normal operation, amber = operating error, red = smoke or carbon monoxide detected and a loud 85-decibel alarm will sound.
No. 9 
Kidde Carbon Monoxide Detector with 10-Year Battery, 3 LEDs, Replacement Indicator, Test-Reset Button
- Electrochemical sensor technology detects CO gas
- Easy installation, no wiring needed: operates on a 10-year lithium battery, so it never needs replacing, plus detects during power failure
- Conveniently designed & portable: simple to install on a wall of your home or place on a tabletop
- 85-decibel alarm alerts to carbon monoxide
- 3 LEDs indicate: green = normal operation, red = carbon monoxide presence, & amber = replace the detector
No. 10 
Kidde Smoke Detector, AA Battery Powered, LED Warning Light Indicators, 1 Pack, White, 30CUAR
- 2-IN-1 DETECTION: Alerts you to both smoke & carbon monoxide (CO) using a single, cost-effective detector.
- HARDWIRED & 2 AA BATTERY BACKUP (Included): Operates on 120V AC wiring (installed in the ceiling) with 2 AA alkaline batteries that provide battery backup coverage during power outages.
- ENHANCED SENSING TECHNOLOGY: Reduces false smoke alarms often caused by cooking. Comprehensively tested to meet the latest UL standards, meets UL 217 9th Edition, UL 2034 4th Edition, & FCC standards.
- INTERCONNECT CAPABILITY: When one alarm sounds, they all sound, so you can get out faster. (Different models offer different interconnection options and requirements. See User Guide for more info.)
- SELF-TESTING ALARM: Internal components ensure alarm is always operating as expected. Not a substitute for a manual push test, perform a button test once per week to verify alarm operation.
Last update on 2025-05-30
