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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.
Emits T3 pattern. To ensure complete protection make sure to place one on each level of your home and in each bedroom. Rigorously tested to meet UL standards. Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety. Note: a loose neutral white wire connection within the home junction box could prompt a device malfunction.

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.
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.

To ensure complete protection make sure to place 1 on each level of your home and in each bedroom.

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.
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. Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety. Dust cover.




1. First Alert / BRK Brands, Inc.
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Pack of 12, First Alert BRK ADF-12 BRK Smoke Alarm Adapter Plug for Firex Hardwire Smoke Alarms
#adFirst Alert / BRK Brands, Inc. #ad - Easily replace hardwired Firex smoke alarms with First Alert or BRK smoke alarms. Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety. Compatible with sc9120b, 5919, hd6135fb, 4120-series, 7010-series, 2002rac, 9120-series, SC6120B, and RM3 First Alert or BRK alarms.More information #ad
Ideal for retrofitting jobs. Includes 12 smoke alarm adapter plugs. Refer to the pdf attached below in Technical Specification for User Manual for compatible models and brands. Compatible with 406 g-6, 4618 fadc, 4480 pad, 484 pg-40, 5700 adh, 4518 adc, and 499 Firex alarms.Brand | First Alert / BRK Brands, Inc. #ad |
Manufacturer | First Alert / BRK Brands, Inc. #ad |
Height | 1 Inches |
Length | 3 Inches |
Weight | 0.5 Pounds |
Width | 1 Inches |
Part Number | ADF-12 |
Model | ADF-12 |
More information #ad
2. FIRST ALERT
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First Alert ADK-12 Smoke Alarm Adapter Plug
#adFIRST ALERT #ad - Convenient adapter plug saves time and installation costs when retrofitting existing homes or apartments. Compatible for hardwire replacement of Kidde, Fyrnetics and Lifesaver models. Pack of 12.More information #ad
Easily connect first alert BRK smoke and combination alarms to competitive alarms without rewiring. Faster turnarounds on job sites with the easy to install, most trusted alarms in home safety. Ideal for retrofit applications. See full list of compatible models below.Brand | FIRST ALERT #ad |
Manufacturer | First Alert / BRK Brands, Inc. #ad |
Height | 1 Inches |
Length | 3 Inches |
Weight | 0.31 Pounds |
Width | 1 Inches |
Part Number | ADK-12 |
Model | ADK-12 |
More information #ad
3. FIRST ALERT
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6-Pack, First Alert BRK 9120B6CP Hardwired Smoke Alarm with Backup Battery
#adFIRST ALERT #ad - Equipped with an ionization sensor, this smoke alarm reliably detects smoke from fast flaming fires and alerts you with an 85 decibel alarm. 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.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
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. Can connect to other compatible BRK or First Alert smoke detectors, to ensure all alarms will sound when smoke is detected. Emits T3 pattern. To ensure complete protection make sure to place one on each level of your home and in each bedroom. Rigorously tested to meet UL standards. Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety. 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
4. FIRST ALERT
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First Alert BRK SC7010B Hardwired Smoke and Carbon Monoxide CO Detector with Battery Backup , White
#adFIRST ALERT #ad - Can connect to other compatible BRK or First Alert detectors, to ensure all alarms will sound when threat is detected. Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety. 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.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.
More information #ad
Rigorously tested to meet UL standards. 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. 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.
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
5. FIRST ALERT
#ad
6-Pack, FIRST ALERT BRK 3120B-6 Hardwired Smoke Detector with Photoelectric and Ionization with Battery Backup
#adFIRST ALERT #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. Equipped with both a photoelectric and ionization sensor to quickly detect both fast burning, and smoldering fires, which alerts you with an 85-decibel alarm.To ensure complete protection make sure to place 1 on each level of your home and in each bedroom.
More information #ad
Simple to use, with a single test/silence button and side-load battery compartment; Included mounting bracket makes installation easy. Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety. Equipped with optipath 360 technology that enhances detection with 360-degree access, and reliably detects smoke.Brand | FIRST ALERT #ad |
Manufacturer | First Alert #ad |
Height | 2.4 Inches |
Length | 5.7 Inches |
Weight | 0.7 Pounds |
Width | 5.7 Inches |
Part Number | 3120BFF-6 |
Model | BRK 3120B-6 |
More information #ad
6. FIRST ALERT
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FIRST ALERT BRK SC9120B-3 Hardwired Smoke and Carbon Monoxide CO Detector with Battery Backup. 3-Pack
#adFIRST ALERT #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.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.
More information #ad
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. 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. Dust cover.
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
7. Kidde
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Battery Powered, Kidde Smoke & Carbon Monoxide Detector, Interconnect Combination Smoke & CO Alarm, Voice Alert
#adKidde #ad - Ionization sensor technology - smoke detector detects invisible fire particles, 85 decibel alarm alerts of fire. 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
Protects during a power failure - combo smoke and CO alarm operates on 2-AA batteries. Fire & co detector in 1 unit with alert modes, & voice alarm, led lights, "Fire! Fire!", "Warning! Carbon Monoxide!", that states, or "Low Battery!". Ul certified, 10-year limited warranty.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
8. FIRST ALERT
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6-Pack, First Alert BRK 9120Bff-6 Hardwired Smoke Detector with Battery Backup
#adFIRST ALERT #ad - 10-year limited. Tamper resistant locking pins, single button silence/test and loud 85Db alarm. Open mounting design for easy installation with side load battery compartment for quick replacement and interconnect able up to 18 units 12 smoke, 6 co/heat/relay.More information #ad
120-volt ac power with 9-volt battery backup included to keep alarm functioning during power outage. 6 pack of hardwired smoke alarms, includes battery backup for power outages. Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety.Brand | FIRST ALERT #ad |
Manufacturer | First Alert #ad |
Height | 2.2 Inches |
Length | 5.6 Inches |
Weight | 0.6 Pounds |
Width | 5.6 Inches |
Part Number | 9120BFF-6 |
Model | 9120BFF-6 |
More information #ad
9. BRK
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BRK Brands HD6135FB Hardwire Heat Alarm with Battery Backup
#adBRK #ad - 9-volt battery included; 10-year limited warranty. 120-volt hardwire heat alarm with battery backup. Senses and alarms at 135 degrees Fahrenheit.More information #ad
Interconnectable with BRK and First Alert hardwired smoke and carbon monoxide alarms. Remote controlled test/silence feature; latching alarm indicator.Brand | BRK #ad |
Manufacturer | BRK Brands #ad |
Height | 5.5 Inches |
Length | 2.25 Inches |
Width | 5.5 Inches |
More information #ad
10. Kidde
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KA-F2 1 Pack, Kidde Quick Convert Firex Adapter
#adKidde #ad - The ka-b2 and ka-f2 can be used on all AC/DC Kidde smoke and combination alarms. Quick convert adapter allows the installation of a new Kidde alarm to an existing competitive wiring harness.More information #ad
The smoke alarm adapter also allows the specified approved brands and models to be interconnected with other Kidde product.Brand | Kidde #ad |
Manufacturer | Kidde #ad |
Weight | 0.03 Pounds |
Part Number | KA-F2 |
More information #ad