As an Amazon Associate I earn from qualifying purchases.


Can connect to other compatible BRK or First Alert smoke detectors, to ensure all alarms will sound when smoke is detected. 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. 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. Emits T3 pattern. Note: a loose neutral white wire connection within the home junction box could prompt a device malfunction.

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. 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 your safety. Can connect to other compatible BRK or First Alert detectors, to ensure all alarms will sound when threat is detected. 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.


Keep your family safe with this hardwired First Alert smoke alarm with a 10-year battery backup, which 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; Rigorously tested to meet UL standards. 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.


One button silences a false alarm and tests the unit. Connects multiple alarms together for wireless safety network. Voice alarm gives clear indication of where the problem is located.
1. First Alert / BRK Brands, Inc.
#ad
First Alert BRK ADF-12 BRK Smoke Alarm Adapter Plug for Firex Hardwire Smoke Alarms, Pack of 12
#adFirst Alert / BRK Brands, Inc. #ad - Easily replace hardwired Firex smoke alarms with First Alert or BRK smoke alarms. 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.More information #ad
Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety. Compatible with sc9120b, 5919, hd6135fb, 9120-series, 4120-series, sc6120b, 7010-series, 2002RAC, and RM3 First Alert or BRK alarms. Compatible with 406 g-6, 484 pg-40, 4618 fadc, 4480 pad, 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
#ad
First Alert ADK-12 Smoke Alarm Adapter Plug
#adFIRST ALERT #ad - Faster turnarounds on job sites with the easy to install, most trusted alarms in home safety. See full list of compatible models below. Easily connect first alert BRK smoke and combination alarms to competitive alarms without rewiring.More information #ad
Compatible for hardwire replacement of Kidde, Fyrnetics and Lifesaver models. Ideal for retrofit applications. Convenient adapter plug saves time and installation costs when retrofitting existing homes or apartments. Pack of 12.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
#ad
First Alert BRK 9120B6CP Hardwired Smoke Alarm with Backup Battery, 6-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 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. Equipped with an ionization sensor, this smoke alarm reliably detects smoke from fast flaming fires and alerts you with an 85 decibel alarm.
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. 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. Emits T3 pattern. 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
#ad
First Alert BRK SC7010B Hardwired Smoke and Carbon Monoxide CO Detector with Battery Backup , White
#adFIRST ALERT #ad - 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.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. 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
Rigorously tested to meet UL standards. 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. Can connect to other compatible BRK or First Alert detectors, to ensure all alarms will sound when threat is detected. In case of danger, the loud spread spectrum alarm is designed to be heard easily by even those with some hearing issues.
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
First Alert SCO500B Wireless Interconnected Photoelectric Smoke and Carbon Monoxide Combo Alarm with Voice and Location
#adFIRST ALERT #ad - Connects multiple alarms together for wireless safety network not z-wave compatible. Voice alarm gives clear indication of what the danger is and where it is located. Battery operated smoke and carbon monoxide alarm can be installed easily.More information #ad
When your alarms are interconnected, they communicate with each other, forming an integrated system of protection for your home. When one alarm sounds, all alarms will sound. Wireless interconnect uses radio frequency communication to connect the alarms, without any electrical wiring needed.Brand | FIRST ALERT #ad |
Manufacturer | First Alert #ad |
Height | 5.13 Inches |
Length | 5.13 Inches |
Weight | 0.6 Pounds |
Width | 2.38 Inches |
Part Number | SCO500B |
Model | OLCOMBOVFF |
Warranty | 7 |
More information #ad
6. FIRST ALERT
#ad
First Alert SA320CN Dual-Sensor Smoke and Fire Alarm, Battery Powered, Frustration-Free Packaging , GRAY
#adFIRST ALERT #ad - To ensure complete protection make sure to place one on each level of your home and in each bedroom. Single test/silence button lets you easily check alarm function and mute false alarms; Use Polaroid AA batteries for best results.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
Help keep your family safe with this battery operated smoke alarm; It requires no rewiring for installation and provides continuous 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. Loud 85 decibel siren sounds to alert you to danger.Brand | FIRST ALERT #ad |
Manufacturer | First Alert #ad |
Height | 2 Inches |
Length | 5 Inches |
Weight | 0 Pounds |
Width | 5 Inches |
Part Number | SA320CN |
Model | SA320FF |
Warranty | 10 Year Limited |
More information #ad
7. Kidde
#ad
Battery Powered, Kidde Smoke & Carbon Monoxide Detector, Interconnect Combination Smoke & CO Alarm, Voice Alert
#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. Ul certified, 10-year limited warranty. Ionization sensor technology - smoke detector detects invisible fire particles, 85 decibel alarm alerts of fire.More information #ad
Fire & co detector in 1 unit with alert modes, "fire! Fire!", that states, "warning! carbon Monoxide!", & voice alarm, LED lights, or "Low Battery!". 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 | 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
#ad
FIRST ALERT BRK 9120LBL Hardwired Smoke Detector with Adapter Plugs for Easy Replacement
#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. Convenient adapter plugs makes it easy to replace existing hardwired alarms without needing to rewire.Keep your family safe with this hardwired First Alert smoke alarm with a 10-year battery backup, which means constant monitoring for the life of the alarm, even if there's a power failure.
More information #ad
Can connect to other compatible BRK or First Alert smoke alarms, to ensure all alarms will sound when smoke is detected. 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. Emits t3 pattern; Rigorously tested to meet UL standards. 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.
Brand | FIRST ALERT #ad |
Manufacturer | First Alert #ad |
Height | 2.25 Inches |
Length | 5.75 Inches |
Weight | 0 Pounds |
Width | 5.75 Inches |
Part Number | 1039939 |
Model | 9120LBL |
More information #ad
9. Kidde
#ad
Kidde Quick Convert Firex Adapter, KA-F2 1 Pack
#adKidde #ad - The ka-b2 and ka-f2 can be used on all AC/DC Kidde smoke and combination alarms. The smoke alarm adapter also allows the specified approved brands and models to be interconnected with other Kidde product.More information #ad
Quick convert adapter allows the installation of a new Kidde alarm to an existing competitive wiring harness.Brand | Kidde #ad |
Manufacturer | Kidde #ad |
Weight | 0.03 Pounds |
Part Number | KA-F2 |
More information #ad
10. FIRST ALERT
#ad
First Alert SCO501CN-3ST Wireless Interconnected Combination Smoke and Carbon Monoxide Alarm with Voice Location, Battery Operated
#adFIRST ALERT #ad - Features photoelectric smoke sensor and electrochemical CO sensor. Battery operated smoke and carbon monoxide alarm can be installed easily.One button silences a false alarm and tests the unit. Connects multiple alarms together for wireless safety network. Voice alarm gives clear indication of where the problem is located.
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. Loud 85 decibel alarm. Note: kindly refer to the user manual provided as a PDF manual in the product description section.Brand | FIRST ALERT #ad |
Manufacturer | First Alert #ad |
Height | 2 Inches |
Length | 5 Inches |
Weight | 0.2 Pounds |
Width | 5 Inches |
Part Number | SCO500 |
Model | SCO500 |
Warranty | 7 Year |
More information #ad