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9v battery Included. Tamper resistant locking Pin Locks Alarm Cover to Prevent Removal of Battery. Electrochemical CO Sensor is the most accurate technology available.


10 year limited warranty; equipped with end of life signal chirp, so you know when it's time to replace the unit for your safety. Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety.
Can connect to other compatible BRK or First Alert detectors, to ensure all alarms will sound when threat is detected. 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. Note: kindly refer to the user manual provided as a PDF manual in the product description section.

Dust cover. Features an electrochemical carbon monoxide sensing technology as well as an ionization sensor that detects the fine particles of a fast-burning fire.
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. 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.





Etl certified: meets the ul 217 & ul 2034 safety standards for your peace of mind and absolute confidence in our product.

Fire & co detector in 1 unit with alert modes, led lights, that states, "warning! carbon Monoxide!", & voice alarm, "Fire! Fire!", 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.
1. FIRST ALERT
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FIRST ALERT Carbon Monoxide Alarm | BRK CO250 Battery Operated Carbon Monoxide Detector With 9-Volt Battery & Two Silence Features
#adFIRST ALERT #ad - Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety. Highest quality, most accurate electrochemical co sensor technology.9v battery Included. Tamper resistant locking Pin Locks Alarm Cover to Prevent Removal of Battery. Electrochemical CO Sensor is the most accurate technology available.
More information #ad
Helpful, 2 silence features that silence both alarm and low-battery chirp. Convenient, end of life chirping signal. Two silence features silence Low Battery Chirp For up to 8 Hours. Features, 9-volt battery and all necessary mounting hardware. End of Life Signal.Brand | FIRST ALERT #ad |
Manufacturer | First Alert #ad |
Height | 1.6 Inches |
Length | 4.25 Inches |
Weight | 0.39 Pounds |
Width | 4.25 Inches |
Part Number | CO250B |
Model | CO250B |
Warranty | 7 Year Limited Warranty |
More information #ad
2. Kidde
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Kidde Smoke & Carbon Monoxide Detector, Interconnect Combination Smoke & CO Alarm, Battery Powered, Voice Alert
#adKidde #ad - Fire & co detector in 1 unit with alert modes, & voice alarm, that states, "Warning! Carbon Monoxide!", LED lights, "fire! fire!", or "Low Battery!". Ionization sensor technology - smoke detector detects invisible fire particles, 85 decibel alarm alerts of fire.More information #ad
Protects during a power failure - combo smoke and CO alarm operates on 2-AA batteries. 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.Brand | Kidde #ad |
Manufacturer | Kidde Safety #ad |
Height | 5.6 Inches |
Length | 1.8 Inches |
Weight | 1 Pounds |
Width | 5.6 Inches |
Part Number | 21026043 |
Model | KN-COSM-BA |
Warranty | 5-year limited warranty |
More information #ad
3. FIRST ALERT
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FIRST ALERT BRK SC7010BV Hardwired Talking Photoelectric Smoke and Carbon Monoxide CO Detector
#adFIRST ALERT #ad - Rigorously tested to meet UL standards. The 85-decibel alarm provides a clear, loud warning upon detection. 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.10 year limited warranty; equipped with end of life signal chirp, so you know when it's time to replace the unit for your safety. Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety.
More information #ad
Tells you whether the danger is smoke or carbon monoxide and where the threat is among up to 11 preprogrammed locations in your home. Keep your family safe with this talking hardwired smoke and carbon monoxide alarm; It's equipped with voice and location, so you are alerted of the danger and where it originates from across your house. Can connect to other compatible BRK or First Alert detectors, to ensure all alarms will sound when threat is detected. 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. Note: kindly refer to the user manual provided as a PDF manual in the product description section.
Brand | FIRST ALERT #ad |
Manufacturer | First Alert / BRK Brands, Inc. #ad |
Height | 5.13 Inches |
Length | 5.13 Inches |
Weight | 0.7 Pounds |
Width | 2.38 Inches |
Part Number | SC7010BV |
Model | SC7010BV |
Warranty | 10 year |
More information #ad
4. FIRST ALERT
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FIRST ALERT BRK SC9120B-3 Hardwired Smoke and Carbon Monoxide CO Detector with Battery Backup. 3-Pack , White
#adFIRST ALERT #ad - 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.Dust cover. 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
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. Can connect to other compatible BRK or First Alert detectors, to ensure all alarms will sound when threat is detected. 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. 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
5. Kidde
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AC-Plug-In with Battery Backup, CO Alarm with Replacement Alert, Kidde Carbon Monoxide Detector
#adKidde #ad - Co detector that alerts with a warning signal against dangerous levels of carbon monoxide in your home. Easy & quick installation - plugs directly into your home's standard wall outlet, 85 decibel alarm alerts of fire.More information #ad
Whole home family protection - place 1 carbon monoxide detector on each level of your home & in your bedroom to protect from poisonous gases. Ul certified, 10-year limited warranty. Protects during a power failure - 2-AA batteries, included with pack, provide backup service in the event of a power outage.Brand | Kidde #ad |
Manufacturer | Kidde #ad |
Height | 4.5 Inches |
Length | 2.75 Inches |
Weight | 1.5 Pounds |
Width | 1.5 Inches |
Part Number | 900-0263 |
Model | KN-COB-DP2 |
More information #ad
6. Kidde
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Kidde Carbon Monoxide Detector, CO Alarm, Battery Powered with LED Lights
#adKidde #ad - Sophisticated electronic components to protect you & your family from the dangers of carbon monoxide, 85 decibel alarm alerts of fire. Protects during a power failure - operates on 2-AA batteries, included with pack.More information #ad
Whole home family protection - place 1 carbon monoxide detector on each level of your home & in your bedroom to protect from poisonous gases. Ul certified, 10-year limited warranty. 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-COSM-BA |
Warranty | 10-Year warranty: Consult User Guide for more information. |
More information #ad
7. FIRST ALERT
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White, FIRST ALERT BRK CO5120BN Hardwired Carbon Monoxide CO Detector with Battery Backup
#adFIRST ALERT #ad - Can integrate with up to 18 compatible devices for extended coverage; Emits T3 Pattern. Electrochemical sensor accurately detects carbon monoxide. Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety.More information #ad
120 volt hard wired carbon monoxide alarm wires directly into your home's electrical system. Microprocessor controlled to minimize false alarms. Plastic. Imported. Easy to access battery drawer; 9 volt battery included.Brand | FIRST ALERT #ad |
Manufacturer | BRK Brands #ad |
Height | 5.72 Inches |
Length | 5.53 Inches |
Weight | 0.55 Pounds |
Width | 2.09 Inches |
Part Number | GID-601054 |
Model | CO5120BN |
Warranty | ------- |
More information #ad
8. Kidde
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CO Alarm, Kidde Carbon Monoxide Detector with Battery Backup, Digital Display & LED Lights
#adKidde #ad - Protects during a power failure - CO detector operates on 3-AA batteries. Electrochemical sensing technology - CO alarm detects the presence of carbon monoxide gas, 85 decibel alarm.More information #ad
Easy to read digital display - allows for easy viewing of carbon monoxide levels. Ul certified, 10-year limited warranty. Co detector with alert modes & 2 LED lights that pulse for power & CO detection.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
9. X-Sense
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SC01, X-Sense 10 Year Battery Not Hardwired Smoke and Carbon Monoxide Detector with LCD Display, Dual Sensor Smoke CO Alarm Complies with UL 217 & UL 2034 Standards, Auto-Check
#adX-Sense #ad - Informative lcd: clearly indicates real-time carbon monoxide CO levels in the surrounding air, as well as its battery level and working status. 2-in-1 protection: equipped with both photoelectric smoke sensor and electrochemical CO sensor that both detect smoke and dangerous CO levels.Etl certified: meets the ul 217 & ul 2034 safety standards for your peace of mind and absolute confidence in our product.
More information #ad
Simple installation: requires no rewiring; easy to mount on any wall or ceiling with the included mounting bracket, screws and anchor plugs. 10-year battery: provides 10 years of continuous power with a built-in lithium battery; saves you from battery replacement. Assured quality: we offer 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 | 0.69 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
10. Kidde
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Interconnect Combination Smoke & CO Alarm with Battery Backup, Voice Alert, Hardwired, Kidde Smoke & Carbon Monoxide Detector
#adKidde #ad - Ionization sensing technology - hardwired smoke detector detects invisible fire particles, 85 decibel alarm alerts of fire. 120v ac, all kidde brand hard wired smoke alarms are interconnectable with the KN-COSM-IBA.Fire & co detector in 1 unit with alert modes, led lights, that states, "warning! carbon Monoxide!", & voice alarm, "Fire! Fire!", 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. Meets safety standards set by Underwriters Laboratories UL and interconnects with other KN-COSM-IBA models. Protects during a power failure - combo smoke and CO detector operates on a 120VAC power source with 2-AA battery backup.Brand | Kidde #ad |
Manufacturer | Kidde Safety #ad |
Height | 6 Inches |
Length | 2 Inches |
Weight | 0.4 Pounds |
Width | 6 Inches |
Part Number | 21026041 |
Model | KN-COSM-IBA |
Warranty | 10 Year Limited |
More information #ad