As an Amazon Associate I earn from qualifying purchases.
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. Rigorously tested to meet ul standards120 volt AC power with 9V battery backup to keep alarm functioning during power outage.
To ensure complete protection make sure to place one on each level of your home and in each bedroom. 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. Equipped with an ionization sensor, this smoke alarm reliably detects smoke from fast flaming fires and alerts you with an 85 decibel alarm.


Features an electrochemical carbon monoxide sensing technology as well as an ionization sensor that detects the fine particles of a fast-burning fire.
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 3-pack of hardwired smoke and carbon monoxide alarm; The battery backup means constant monitoring, even if there's a power failure.

Emits T3 pattern. 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.
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. Equipped with an ionization sensor, this smoke alarm reliably detects smoke from fast flaming fires and alerts you with an 85 decibel alarm. Rigorously tested to meet UL standards. Note: a loose neutral white wire connection within the home junction box could prompt a device malfunction.

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. Ul certified, 10-year limited warranty.


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. Equipped with an ionization sensor, this smoke alarm reliably detects smoke from fast-flaming fires and alerts you with an 85-decibel alarm.



1. FIRST ALERT
#ad
First Alert BRK 9120B Hardwired Smoke Alarm with Battery Backup , White
#adFIRST ALERT #ad - Keep your family safe with this hardwired smoke 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.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. Rigorously tested to meet ul standards120 volt AC power with 9V battery backup to keep alarm functioning during power outage.
More information #ad
Can connect to other compatible BRK or first alert smoke detectors, to ensure all alarms will sound when smoke is detected. To ensure complete protection make sure to place one on each level of your home and in each bedroom. 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. 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 |
Height | 2.2 Inches |
Length | 5.6 Inches |
Weight | 0.8 Pounds |
Width | 5.6 Inches |
Part Number | 9120BFF |
Model | 9120B |
Warranty | 10 Year Limited |
More information #ad
2. Kidde
#ad
Kidde Smoke Detector, Test-Silence Button, Hardwired Smoke Alarm with Battery Backup
#adKidde #ad - Protects during a power failure - smoke alarm operates on a 120V power source with 9V battery backup in front-load battery door. Ionization sensing technology - hardwired smoke detector detects invisible fire particles, 85 decibel alarm alerts of fire.More information #ad
Whole home family protection - place 1 fire detector on each level of your home & in your bedroom. Test-hush feature - silences the unit for approximately 7 minutes. Ul certified, 10-year limited warranty.Brand | Kidde #ad |
Manufacturer | Kidde Safety #ad |
Height | 6 Inches |
Length | 6 Inches |
Width | 2 Inches |
Part Number | 21029730 |
Model | i12060A |
Warranty | 5 Year Limited |
More information #ad
3. FIRST ALERT
#ad
FIRST ALERT BRK SC9120B-3 Hardwired Smoke and Carbon Monoxide CO Detector with Battery Backup. 3-Pack
#adFIRST ALERT #ad - Dust cover. 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.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. 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. 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 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
4. FIRST ALERT
#ad
First Alert BRK 9120B6CP Hardwired Smoke Alarm with Backup Battery, 6-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. Can connect to other compatible BRK or First Alert smoke detectors, to ensure all alarms will sound when smoke is detected.Emits T3 pattern. 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.
More information #ad
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. 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. Equipped with an ionization sensor, this smoke alarm reliably detects smoke from fast flaming fires and alerts you with an 85 decibel alarm. Rigorously tested to meet UL standards. Note: a loose neutral white wire connection within the home junction box could prompt a device malfunction.
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
5. Kidde
#ad
Kidde Smoke & Carbon Monoxide Detector, Interconnect Combination Smoke & CO Alarm with Battery Backup, Voice Alert, Hardwired
#adKidde #ad - Temperature Range-40˚F 4. 4˚c to 100˚f 37. 8˚c. Protects during a power failure - combo smoke and co detector operates on a 120VAC power source with 2-AA battery backup.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. Ul certified, 10-year limited warranty.
More information #ad
Meets safety standards set by Underwriters Laboratories UL and interconnects with other KN-COSM-IBA models. Test-hush feature - silences the unit for approximately 9 minutes; tamper-resistant technology deters removal of the unit from the wall or ceiling. Fire & co detector in 1 unit with alert modes, & voice alarm, "Fire! Fire!", LED lights, "Warning! Carbon Monoxide!", that states, or "Low Battery!".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
6. Kidde
#ad
Kidde i4618 Firex Hardwire Ionization Smoke Detector with Battery Backup 4 Pack
#adKidde #ad - Red led flashes until reset for quick, clear identification of initiating smoke alarm in interconnected system. False alarm control quiets unwanted alarms for up to 8 minutes.More information #ad
Visible low battery indicator helps locate chirping unit. Interconnects with other compatible Firex smoke alarms and heat alarms. Front loading battery door makes battery changing simple, power link tab makes installation faster.Brand | Kidde #ad |
Manufacturer | Kidde #ad |
Part Number | i4618-4 |
More information #ad
7. FIRST ALERT
#ad
FIRST ALERT BRK 9120B-12 Hardwired Smoke Detector with Backup Battery, 12-Pack
#adFIRST ALERT #ad - To ensure complete protection make sure to place one on each level of your home and in each bedroom. Keep your family safe with this 12-pack of hardwired smoke alarms; The battery backup means constant monitoring, even if there's a power failure.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.
More information #ad
Can connect to other compatible BRK or First Alert smoke detectors, to ensure all alarms will sound when smoke is detected. 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. Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety. 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 / BRK Brands, Inc. #ad |
Height | 2.2 Inches |
Length | 5.6 Inches |
Weight | 0.6 Pounds |
Width | 5.6 Inches |
Part Number | 9120BFF-12 |
Model | 9120BFF-12 |
More information #ad
8. Kidde
#ad
Smoke Alarm with LED Lights, Hardwired with Battery Backup & Interconnect, Kidde Smoke Detector
#adKidde #ad - Test-hush feature - silences the unit for approximately 7 minutes. Photoelectric sensing technology - hardwired smoke detector detects visible fire particles associated with smoldering fires, 85 decibel alarm alerts of fire.More information #ad
Ul certified, 10-year limited warranty. Protects during a power failure - smoke alarm operates on a 120V power source with 9V battery backup. Whole home family protection - place 1 fire detector on each level of your home & in your bedroom - maximum of 24 Kidde smoke or CO detectors can be interconnected in a multiple stations.Brand | Kidde #ad |
Manufacturer | Kidde Safety #ad |
Height | 6 Inches |
Length | 2 Inches |
Width | 6 Inches |
Part Number | 21006371 |
Model | P12040 |
Warranty | 5 Year Limited |
More information #ad
9. Kidde
#ad
Hardwired Smoke Alarm with Battery Backup & Interconnect, Kidde Smoke Detector, Test-Silence Button
#adKidde #ad - Protects during a power failure - smoke alarm operates on a 120V power source with 9V battery backup. Ul certified, 10-year limited warranty. Ionization sensing technology - hardwired smoke detector detects invisible fire particles, 85 decibel alarm alerts of fire.More information #ad
Test-hush feature - silences the unit for approximately 7 minutes. Whole home family protection - place 1 fire detector on each level of your home & in your bedroom - maximum of 24 Kidde smoke or CO detectors can be interconnected in a multiple stations.Brand | Kidde #ad |
Manufacturer | Kidde Safety #ad |
Height | 6 Inches |
Length | 2 Inches |
Weight | 0.74 Pounds |
Width | 6 Inches |
Part Number | 21029727 |
Model | I12040A |
Warranty | 5 Year Limited |
More information #ad
10. Kidde
#ad
Interconnect Combination Smoke & CO Alarm with Battery Backup, Voice Alert, Kidde Smoke & Carbon Monoxide Detector, 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
Fire & co detector in 1 unit with alert modes, & voice alarm, "Fire Fire", that states, led lights, "Warning Carbon Monoxide", or "Low Battery". 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.Brand | Kidde #ad |
Manufacturer | Kidde Safety #ad |
Height | 1.85 Inches |
Length | 5.79 Inches |
Width | 5.79 Inches |
Part Number | 21029735 |
Model | KN-COPE-IC |
Warranty | 7 year limited |
More information #ad