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Keep your family safe with this hardwired smoke and carbon monoxide alarm; The battery backup means constant monitoring, even if there's a power failure.
Features an electrochemical carbon monoxide sensing technology as well as an ionization sensor for smoke detection. 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.


Keep your family safe with this hardwired smoke alarm; the 10-year battery backup means constant monitoring for the life of the alarm, even if there's a power failure.

Latching alarm indicator Remembers Which Unit Initiated an Alarm. Separate smoke and CO detects both dangers and eliminates the need for two separate alarms.

It should be installed in every room except the bathroom and kitchen, bathroom, more than 3 ft from the kitchen, or other high air flow areas. Even in sleeping, which is more sensitive to light smoke and slow smoldering fires.
If you have any problem with smoke detector, THK 1. 9 inch. Size and battery▶ portable size, dia 3. 9inch, please contact us, please change batteries in 7 days if low battery alert goes off. Avoid fire hazards▶ fire alarms smoke detectors meet ul safety requirements for homes, cut the risk of dying in home fire by 50%, while home fire starts every 83 seconds! The faster you know about a fire, the faster you can escape from the 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. Features an electrochemical carbon monoxide sensing technology as well as intelligent smoke sensing technology to reduce nuisance alarms; Keyhole slots in the mounting bracket eliminate the need to remove the electrical box screws for installation.
10-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 safer with this hardwired smoke and carbon monoxide alarm; The 10 year battery backup means constant monitoring for the life of the alarm even if there's a power failure.

Equipped with an ionization sensor, this smoke alarm reliably detects smoke from fast flaming fires and alerts you with an 85 decibel alarm. Emits T3 pattern.
Can connect to other compatible BRK or First Alert smoke detectors, to ensure all alarms will sound when smoke is detected. Rigorously tested to meet UL standards. 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.

Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety. 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. 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.
Rigorously tested to meet UL standards. Note: kindly refer to the user manual provided as a PDF manual in the product description section. Tells you whether the danger is smoke or carbon monoxide and where the threat is among up to 11 preprogrammed locations in your home. 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.


Features electrochemical carbon monoxide sensing technology as well as a photoelectric sensor equipped with Optipath 360 technology that enhances detection with 360 degree access and reliably detects smoke from smoldering fires.
Rigorously tested to meet UL standards. Can connect to other compatible BRK or First Alert detectors, to ensure all alarms will sound when threat is detected. 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.
1. FIRST ALERT
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White, FIRST ALERT BRK SC9120B Hardwired Smoke and Carbon Monoxide CO Detector with Battery Backup, 1 pack
#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.Keep your family safe with this hardwired smoke and carbon monoxide alarm; The battery backup means constant monitoring, even if there's a power failure.
More information #ad
Rigorously tested to meet UL standards. Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety. Features an electrochemical carbon monoxide sensing technology as well as an ionization sensor for smoke detection. 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.
Brand | FIRST ALERT #ad |
Manufacturer | First Alert #ad |
Height | 1.9 Inches |
Length | 5.6 Inches |
Weight | 0.25 Pounds |
Width | 5.6 Inches |
Part Number | SC9120B |
Model | SC9120B |
Warranty | 7 Year Limited |
More information #ad
2. FIRST ALERT
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First Alert BRK SC-9120B Hardwired Smoke and Carbon Monoxide CO Detector with Battery Backup
#adFIRST ALERT #ad - Superior carbon monoxide sensor and dual ionization smoke alarm. 9-volt battery included; 7-year limited warranty. Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety.More information #ad
Easy to install universal mount bracket. Simple to use silence/test button; separate smoke and CO latching alarm indicators. Inter-connectable with BRK and First Alert hardwired smoke and carbon monoxide alarms.Brand | FIRST ALERT #ad |
Manufacturer | BRK Brands #ad |
Height | 5.69 Inches |
Length | 5.59 Inches |
Weight | 0.65 Pounds |
Width | 2.25 Inches |
Part Number | SC9120B |
Model | SC9120B |
More information #ad
3. FIRST ALERT
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FIRST ALERT BRK SC9120B Hardwired Smoke and Carbon Monoxide Detector with Battery Backup and FIRST ALERT BRK9120b6CP Smoke Detector Alarm | Hardwired with Backup Battery
#adFIRST ALERT #ad - Features an electrochemical carbon monoxide sensing technology as well as intelligent smoke sensing technology to reduce nuisance alarms. Keyhole slots in the mounting bracket eliminate the need to remove the electrical box screws for installation.Keep your family safe with this hardwired smoke alarm; the 10-year battery backup means constant monitoring for the life of the alarm, even if there's a power failure.
More information #ad
Keep your family safer with this hardwired smoke and carbon monoxide alarm; the 10-year battery backup means constant monitoring for the life of the alarm even if there's a power failure. Equipped with an ionization sensor, this smoke alarm reliably detects smoke from fast-flaming fires and alerts you with an 85-decibel alarm.Brand | FIRST ALERT #ad |
Manufacturer | First Alert #ad |
More information #ad
4. FIRST ALERT
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First Alert BRK SCO2B Smoke and Carbon Monoxide CO Detector with 9V Battery , White
#adFIRST ALERT #ad - Electrochemical co sensor is the most accurate technology available. Latching alarm indicator remembers which unit initiated an alarm. Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety.Latching alarm indicator Remembers Which Unit Initiated an Alarm. Separate smoke and CO detects both dangers and eliminates the need for two separate alarms.
More information #ad
It can ship within the US except New York and California. Two locking features Pins Lock Battery Drawer and/or Alarm to Base. End of life signal provides Audible Notice When Alarm Needs to be Replaced. Electrochemical CO Sensor is the most accurate technology available. Separate smoke and co detects both dangers and eliminates the need for two separate alarms.Brand | FIRST ALERT #ad |
Manufacturer | First Alert #ad |
Height | 2 Inches |
Length | 5.6 Inches |
Weight | 0.59 Pounds |
Width | 5.6 Inches |
Part Number | SC02B |
Model | SCO2B |
Warranty | 7 Year Limited Warranty |
More information #ad
5. SITERWELL
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Smoke Alarm with Test-Silence Button, Photoelectric Sensor Fire Alarms Smoke Detectors with LED Lights, SITERLINK Smoke Detectors Battery Operated, UL Listed Fire Alarm for House, GS528A, 4 Packs
#adSITERWELL #ad - Timely alarm, there is no need to worry. Advanced technology▶ smoke alarm adopts photoelectric technology, 85 db sound is loud enough to alert all members at home. Do not use an open flame to test smoke alarm, you will damage the alarm or ignite combustible materials and cause structure fire.It should be installed in every room except the bathroom and kitchen, bathroom, more than 3 ft from the kitchen, or other high air flow areas. Even in sleeping, which is more sensitive to light smoke and slow smoldering fires.
More information #ad
1 year battery operated smoke detector, we will solve it. Test button▶ test smoke detector weekly by pushing the test button on the cover and holding it down at least 5 seconds. Complete home protection▶ fire detector doesn't contain radioactive material. If you have any problem with smoke detector, THK 1. 9 inch. Size and battery▶ portable size, dia 3. 9inch, please contact us, please change batteries in 7 days if low battery alert goes off. Avoid fire hazards▶ fire alarms smoke detectors meet ul safety requirements for homes, cut the risk of dying in home fire by 50%, while home fire starts every 83 seconds! The faster you know about a fire, the faster you can escape from the fire.
Brand | SITERWELL #ad |
Manufacturer | SITERWELL ELECTRONICS CO.,LIMITED #ad |
Height | 1.9 Inches |
Length | 3.94 Inches |
Weight | 0.44 Pounds |
Width | 3.94 Inches |
Part Number | GS528-4 |
Model | GS528 |
More information #ad
6. FIRST ALERT
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White, First Alert BRK SC9120LBL Hardwired Smoke and Carbon Monoxide CO Detector with 10 Year Sealed Battery Backup
#adFIRST ALERT #ad - Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety. Rigorously tested to meet UL standards, Emits T3 pattern. Simple to use, with a single test/silence button; Included 10 year lithium battery features a locked drawer to prevent tampering.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. Features an electrochemical carbon monoxide sensing technology as well as intelligent smoke sensing technology to reduce nuisance alarms; Keyhole slots in the mounting bracket eliminate the need to remove the electrical box screws for installation.
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. 10-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 safer with this hardwired smoke and carbon monoxide alarm; The 10 year battery backup means constant monitoring for the life of the alarm even if there's a power failure.
Brand | FIRST ALERT #ad |
Manufacturer | First Alert #ad |
Height | 5.69 Inches |
Length | 5.59 Inches |
Width | 2.25 Inches |
Part Number | SC9120LBL |
Model | BRK SC9120LBL |
Warranty | 7 |
More information #ad
7. FIRST ALERT
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6-Pack, First Alert BRK 9120B6CP Hardwired Smoke Alarm with Backup Battery
#adFIRST ALERT #ad - Note: a loose neutral white wire connection within the home junction box could prompt a device malfunction. Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety. To ensure complete protection make sure to place one on each level of your home and in each bedroom.Equipped with an ionization sensor, this smoke alarm reliably detects smoke from fast flaming fires and alerts you with an 85 decibel alarm. Emits T3 pattern.
More information #ad
Keep your family safe with this 6 pack of hardwired smoke alarms; the battery backup means constant monitoring, even if there's a power failure. 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 smoke detectors, to ensure all alarms will sound when smoke is detected. Rigorously tested to meet UL standards. 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 | 5.6 Inches |
Length | 5.6 Inches |
Width | 1.9 Inches |
Part Number | 9120B6CP |
Model | BRK9120b |
Warranty | 10 year |
More information #ad
8. FIRST ALERT
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FIRST ALERT BRK SC7010BV Hardwired Talking Photoelectric Smoke and Carbon Monoxide CO Detector
#adFIRST ALERT #ad - 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.Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety. 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. 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.
More information #ad
Can connect to other compatible BRK or First Alert detectors, to ensure all alarms will sound when threat is detected. Rigorously tested to meet UL standards. Note: kindly refer to the user manual provided as a PDF manual in the product description section. Tells you whether the danger is smoke or carbon monoxide and where the threat is among up to 11 preprogrammed locations in your home. 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 / 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
9. Kidde
#ad
Voice Alert, Battery Powered, Interconnect Combination Smoke & CO Alarm, Kidde Smoke & Carbon Monoxide Detector
#adKidde #ad - Test-hush feature - silences the unit for approximately 8 minutes; tamper-resistant technology deters removal of the unit from the wall or ceiling. Fire & co detector in 1 unit with alert modes, that states, LED lights, "Warning! Carbon Monoxide!", "Fire! Fire!", & voice alarm, or "Low Battery!".More information #ad
Ul certified, 10-year limited warranty. Ionization sensor technology - smoke detector detects invisible fire particles, 85 decibel alarm alerts of fire. Protects during a power failure - combo smoke and CO alarm operates on 2-AA batteries.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
10. FIRST ALERT
#ad
First Alert BRK SC7010B Hardwired Smoke and Carbon Monoxide CO Detector with Battery Backup , White
#adFIRST ALERT #ad - Keep your family safe with this hardwired smoke and carbon monoxide alarm; The battery backup means constant monitoring, even if there's a power failure. Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety.Features electrochemical carbon monoxide sensing technology as well as a photoelectric sensor equipped with Optipath 360 technology that enhances detection with 360 degree access and reliably detects smoke from smoldering fires.
More information #ad
In case of danger, the loud spread spectrum alarm is designed to be heard easily by even those with some hearing issues. 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. Rigorously tested to meet UL standards. Can connect to other compatible BRK or First Alert detectors, to ensure all alarms will sound when threat is detected. 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.
Brand | FIRST ALERT #ad |
Manufacturer | First Alert #ad |
Height | 2 Inches |
Length | 5 Inches |
Weight | 0.7 Pounds |
Width | 5 Inches |
Part Number | SC7010B |
Model | SC7010B |
Warranty | 7 Year Limited Warranty |
More information #ad