Best Dual Sensor Smoke Alarm Hardwired

First Alert Wireless Interconnected Photoelectric Smoke and Carbon Monoxide Combo Alarm & Hardwired Wireless Smoke Alarm with Photoelectric Sensor and Battery Backup SA521CN-3ST White

Product 1: Battery-operated smoke and carbon monoxide alarm.
Product 1: Connects multiple alarms together for wireless safety network.
Product 1: Voice alarm gives clear indication of where the problem is located.
Product 1: Features photoelectric smoke sensor and electrochemical CO sensor.
Product 2: Help keep your family safe with this hardwired smoke alarm that wirelessly interconnects with other First Alert–enabled alarms to create....

Product 1: Battery operated smoke and carbon monoxide alarm can be installed easily.
Product 1: Connects multiple alarms together for wireless safety network.
Product 1: Voice alarm gives clear indication of where the problem is located.
Product 1: Features photoelectric smoke sensor and electrochemical CO sensor.
Product 2: Keep your family safe with this talking hardwired smoke and carbon monoxide alarm.
It's equipped with voice and location, so you are....

Keep your family safe with this hardwired smoke alarm 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.
To ensure complete protection make sure to place one on each level of your home and in each bedroom.
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.
Rigorously tested to meet UL standards120 volt AC power with 9V battery backup to keep alarm functioning during power outage.
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.

2-in-1 Accurate,Reliable &Highly Sensitive Alarm: Equipped with both photoelectric smoke sensor and electrochemical CO sensor that work independently....
LCD Display: Clearly indicates real-time carbon monoxideCOconcentration in the surrounding air as well as the remaining battery life and working....
Test/Silence Button: Tests the unit for proper operation and resets the smoke and carbon monoxide alarm. Alarm Volume:Loud>85dB(A) at 1 meters. Loud....
Easy Install and Use:The alarm can easily install with mounting bracket.No hardwired anymore, very convenient to install at home or bedroom-wall....
Safety and 5 year Warranty: Low battery sianal alarm and "end of life"warning ensures the detector can work normal. Environment friendly, without....

2-in-1 Accurate, Reliable & Highly Sensitive Alarm: Equipped with both photoelectric smoke sensor and electrochemical CO sensor that work....
LCD Display: Clearly indicates real-time carbon monoxide (CO) concentration in the surrounding air, as well as the remaining battery life and working....
Test/Silence Button: Tests the unit for proper operation and resets the smoke and carbon monoxide alarm, Alarm Volume: Loud > 85dB(A) at 1 meters.....
Easy Install and Use: The alarm can easily install with mounting bracket. No hardwired anymore, very convenient to install at home or bedroom - wall....
Safety and 5 year Warranty: Low battery signal alarm and "end of life"warning ensures the detector can work normal. Environment friendly, without....

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.
Equipped with an ionization sensor, this smoke alarm reliably detects smoke from fast-flaming fires and alerts you with an 85-decibel alarm.
To ensure complete protection make sure to place one on each level of your home and in each bedroom.
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....

Convenient adapter plugs makes it easy to replace existing hardwired alarms without needing to rewire.
Equipped with an ionization sensor, this smoke alarm reliably detects smoke from fast flaming fires and alerts you with an 85 decibel alarm.
To ensure complete protection make sure to place one on each level of your home and in each bedroom.
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.
Rigorously tested to meet UL standards120 volt AC power with 9V battery backup to keep alarm functioning during power outage.
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.

Keep your family safe with this 3 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.
To ensure complete protection make sure to place one on each level of your home and in each bedroom.
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.
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).

120 volt hardwire smoke alarm with photoelectric sensor and battery backup.
Features convenient 9 volt battery backup, silence/test button, dust cover, 85 decibel alarm.
Inter connectable with BRK and first alert hardwired smoke and carbon monoxide alarms.
Intuitive latching alarm indicator identifies which unit triggered alarm. Backed by 10 year limited warranty and tested to meet UL 217 standards.