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Intelligent technology – smoke and carbon monoxide detector combines ionization & electrochemical sensors to detect invisible fire particles & CO gas; 85dB alarm and voice warning sound when hazard is detected.


Meets safety standards set by Underwriters Laboratories UL and interconnects with other KN-COSM-IBA models. 120v ac, all kidde brand hard wired smoke alarms are interconnectable with the KN-COSM-IBA.


Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety.
Keep your family safe with this 3-pack of talking hardwired smoke and carbon monoxide alarms; they're 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.


Simple to use, with a single test/silence button, and EZ access battery drawer allows you to change batteries without removing alarm from the ceiling.
Features an electrochemical carbon monoxide sensing technology as well as a photoelectric sensor that detects the larger particles of a smoldering fire. Keep your family safe with this talking battery operated 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.

Eliminates worry about battery removal or unauthorized deactivation of alarm. Photoelectric sensor – smoke alarm contains advanced photoelectric sensor that may detect visible particles associated with smoldering fires sooner than ionization alarms.

A home safety network + alexa interconnects with existing traditional hardwired alarms and other Onelink devices sold separately to create a smart home safety network, so if one alarm sounds, they all sound; works with Amazon Alexa so you can ask Alexa to check the status of your Onelink alarm Alexa device sold separately.
Hardwired + battery backup hardwired alarm includes a 10-year sealed battery backup for protection in power outages; for maximum protection, hardwired alarms should be installed on every level of the home and inside each sleeping area. Smoke + co detection 2-in-1 smart smoke and carbon monoxide alarm alerts you to both types of danger in your home, with a photoelectric smoke sensor and electrochemical carbon monoxide sensor.

1. Kidde
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Kidde Smoke & Carbon Monoxide Detector, Voice Warning, Hardwired with 10-Year Battery Backup
#adKidde #ad - Ul certified, 10-year limited warranty. Led lights indicate the alarm's status, with a voice warning to indicate which type of threat is present; a Hush feature silences nuisance alarms, while the end-of-life alert lets you know when it's time to replace the unit.Intelligent technology – smoke and carbon monoxide detector combines ionization & electrochemical sensors to detect invisible fire particles & CO gas; 85dB alarm and voice warning sound when hazard is detected.
More information #ad
Hardwired alarm contains a 10-year tamper proof backup battery to protect your home and family during power outages, eliminates the need for battery replacement. Smart interconnect allows you to connect up to 24 Kidde devices, giving you trusted protection throughout your home.Brand | Kidde #ad |
Manufacturer | Kidde Safety #ad |
Height | 5.5 Inches |
Length | 5.5 Inches |
Width | 1.5 Inches |
Part Number | 21029756 |
Model | i12010SCO |
Warranty | 10 year limited warranty |
More information #ad
2. Kidde
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Kidde Smoke & Carbon Monoxide Detector, Voice Alert, Pack of 2, Hardwired, Interconnect Combination Smoke & CO Alarm with Battery Backup
#adKidde #ad - Test-hush feature - silences the unit for approximately 9 minutes; tamper-resistant technology deters removal of the unit from the wall or ceiling. Protects during a power failure - combo smoke and CO detector operates on a 120VAC power source with 2-AA battery backup.More information #ad
Ul certified, 10-year limited warranty. Ionization sensing technology - hardwired smoke detector detects invisible fire particles, 85 decibel alarm alerts of fire. Fire & co detector in 1 unit with alert modes, & voice alarm, that states, "Warning! Carbon Monoxide!", "Fire! Fire!", LED lights, or "Low Battery!".Brand | Kidde #ad |
Manufacturer | Kidde #ad |
Height | 5.6 Inches |
Length | 2.64 Inches |
Weight | 0.75 Pounds |
Width | 1.8 Inches |
Part Number | 900-0114A |
Model | KN-COSM-IBA |
Warranty | 10 year limited manufacturer |
More information #ad
3. Kidde
#ad
Kidde Smoke & Carbon Monoxide Detector, Voice Alert, Hardwired, Interconnect Combination Smoke & CO Alarm with Battery Backup
#adKidde #ad - Ionization sensing technology - hardwired smoke detector detects invisible fire particles, 85 decibel alarm alerts of fire. Test-hush feature - silences the unit for approximately 9 minutes; tamper-resistant technology deters removal of the unit from the wall or ceiling.Meets safety standards set by Underwriters Laboratories UL and interconnects with other KN-COSM-IBA models. 120v ac, all kidde brand hard wired smoke alarms are interconnectable with the KN-COSM-IBA.
More information #ad
Protects during a power failure - combo smoke and CO detector operates on a 120VAC power source with 2-AA battery backup. Fire & co detector in 1 unit with alert modes, that states, LED lights, "Fire! Fire!", & voice alarm, "Warning! Carbon Monoxide!", or "Low Battery!". Ul certified, 10-year limited warranty.Brand | Kidde #ad |
Manufacturer | Kidde Safety #ad |
Height | 6 Inches |
Length | 2 Inches |
Weight | 1 Pounds |
Width | 6 Inches |
Part Number | 21026041 |
Model | KN-COSM-IBA |
Warranty | 10 Year Limited |
More information #ad
4. Kidde
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Voice Alert, Kidde Smoke & Carbon Monoxide Detector, Interconnect Combination Smoke & CO Alarm with Battery Backup, Hardwired
#adKidde #ad - Photoelectric sensor technology - hardwired smoke detector detects visible fire particles, 85 decibel alarm alerts of fire. Protects during a power failure - combo smoke and CO detector operates on a 120V power source with 9V front-loading battery backup.More information #ad
Test-hush feature - silences the unit for approximately 8 minutes; tamper-resistant technology deters removal of the unit from the wall or ceiling. Ul certified, 10-year limited warranty. Fire & co detector in 1 unit with alert modes, "fire! fire!", LED lights, "Warning! Carbon Monoxide!", & voice alarm, that states, or "Low Battery!".Brand | Kidde #ad |
Manufacturer | Kidde Safety #ad |
Height | 1.85 Inches |
Length | 5.79 Inches |
Weight | 0.7 Pounds |
Width | 5.79 Inches |
Part Number | 21029735 |
Model | KN-COPE-IC |
Warranty | 7 year limited |
More information #ad
5. FIRST ALERT
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FIRST ALERT BRK SC7010BV-3 Hardwired Talking Photoelectric Smoke and Carbon Monoxide CO Detector, White, 3-Pack
#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. Tells you whether the danger is smoke or carbon monoxide and where the threat is among up to 11 pre-programmed locations in your home.Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety.
More information #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. Keep your family safe with this 3-pack of talking hardwired smoke and carbon monoxide alarms; they're 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.
Brand | FIRST ALERT #ad |
Manufacturer | First Alert / BRK Brands, Inc. #ad |
Height | 2.4 Inches |
Length | 5.1 Inches |
Weight | 0.74 Pounds |
Width | 5.1 Inches |
Part Number | SC7010BVFF-3 |
Model | BRK SC7010BV-3 |
More information #ad
6. Kidde
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Battery Powered, Voice Alert, Combination Smoke & CO Alarm, Kidde Smoke & Carbon Monoxide Detector
#adKidde #ad - Fire. Warning. Protects during a power failure - combo smoke and CO alarm operates on 2-AA batteries. 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
Carbon Monoxide. Or "low Battery. ". Ul certified, 10-year limited warranty. Fire and co detector in 1 unit with alert modes, that states, and voice alarm, LED lights, "Fire. Ionization sensor technology - smoke detector detects invisible fire particles, 85 decibel alarm alerts of fire.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 | KN-COSM-BA |
Warranty | 5-year limited warranty |
More information #ad
7. FIRST ALERT
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First Alert SCO7CN Combination Smoke and Carbon Monoxide Detector with Voice and Location, White, Battery Operated
#adFIRST ALERT #ad - 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. 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.Simple to use, with a single test/silence button, and EZ access battery drawer allows you to change batteries without removing alarm from the ceiling.
More information #ad
It can ship within the US except New York. Tells you whether the danger is smoke or carbon monoxide and where the threat is among up to 11 preprogrammed locations in your home. Features an electrochemical carbon monoxide sensing technology as well as a photoelectric sensor that detects the larger particles of a smoldering fire. Keep your family safe with this talking battery operated 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.
Brand | FIRST ALERT #ad |
Manufacturer | Petra Industries, Inc. - Consumer Electronics Replen #ad |
Height | 5 Inches |
Length | 5 Inches |
Weight | 0.75 Pounds |
Width | 2 Inches |
Part Number | SCO7CN |
Model | SCO7CN |
More information #ad
8. Kidde
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Kidde 21026065 Smoke & Carbon Monoxide Alarm with Voice Warning
#adKidde #ad - Combination smoke and carbon monoxide alarm – Smoke and CO sensing technologies work together to detect real fires faster and reduce nuisance alarms. Self-activation – Alarm automatically activates when attached to the mounting bracket.Eliminates worry about battery removal or unauthorized deactivation of alarm. Photoelectric sensor – smoke alarm contains advanced photoelectric sensor that may detect visible particles associated with smoldering fires sooner than ionization alarms.
More information #ad
Voice alarm – announces the hazard type detected thereby helping to speed up the correct reaction. Alarm announces “fire” when a smoke or fire hazard is detected and announces “Warning Carbon Monoxide” when a CO hazard is detected. Sealed-in lithium battery – sealed-in lithium power supply; No battery replacement required over the 10 year life of the alarm.Brand | Kidde #ad |
Manufacturer | Kidde Safety #ad |
Height | 5.22 Inches |
Length | 5.22 Inches |
Weight | 0.33 Pounds |
Width | 1.6 Inches |
Part Number | 21026065 |
Model | P3010CU |
Warranty | 10 year limited |
More information #ad
9. FIRST ALERT
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Onelink by FIRST ALERT Smoke Detector and Carbon Monoxide Detector | Hardwired | First Alert
#adFIRST ALERT #ad - Compatibility compatible with apple HomeKit; can be used on both Apple and Android devices. Interconnectivity: unlike other smart combo alarms, Onelink 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.A home safety network + alexa interconnects with existing traditional hardwired alarms and other Onelink devices sold separately to create a smart home safety network, so if one alarm sounds, they all sound; works with Amazon Alexa so you can ask Alexa to check the status of your Onelink alarm Alexa device sold separately.
More information #ad
Mobile + voice alerts alarm sends emergency notifications, via your phone, while voice alerts tell you the type and location of danger. Hardwired + battery backup hardwired alarm includes a 10-year sealed battery backup for protection in power outages; for maximum protection, hardwired alarms should be installed on every level of the home and inside each sleeping area. Smoke + co detection 2-in-1 smart smoke and carbon monoxide alarm alerts you to both types of danger in your home, with a photoelectric smoke sensor and electrochemical carbon monoxide sensor.
Brand | FIRST ALERT #ad |
Manufacturer | First Alert #ad |
Height | 1.57 Inches |
Length | 5.88 Inches |
Weight | 0.75 Pounds |
Width | 5.88 Inches |
Part Number | 1042135 |
Model | 1039287 |
More information #ad
10. Kidde
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Voice Alert, Lithium Battery Powered, Interconnect Combination Smoke & CO Alarm, Kidde Smoke & Carbon Monoxide Detector
#adKidde #ad - Ul certified, 10-year limited warranty. Photoelectric sensor technology - smoke detector detects visible fire particles, 85 decibel alarm alerts of fire. Low battery warning feature indicates when the battery needs replacement.More information #ad
Co detector with voice alert modes & LED lights that pulse for power, CO detection, & low battery. Protects during a power failure - combo smoke and CO alarm operates on a 10-year, sealed lithium battery.Brand | Kidde #ad |
Manufacturer | Kidde Safety #ad |
Height | 5.59 Inches |
Length | 1.91 Inches |
Weight | 0.6 Pounds |
Width | 5.59 Inches |
Part Number | 21027311 |
Model | P4010DCSCO-W |
Warranty | 10-year limited warranty |
More information #ad