The First Alert 120VAC Hardwired Smoke Alarm with Battery Backup works exceptionally well in detecting flaming fires. Capable of wiring directly into your home's electrical system, these alarms feature a near effortless installation process. This alarm comes equipped with a Mute Button that serves the dual purpose of quickly silencing your alarm as well as testing its function.
First Alert's series of 120VAC Hardwired Smoke Alarms with Battery Backups also comes equipped with an EZ access battery door that removes the hassle and burden of collecting your alarm from the ceiling and replacing its batteries. The combination of a Battery Backup that provides optimal protection in the event of a power outage and an increased emphasis on the unit's 85db output establish the ultimate in peace of mind. This alarm comes with a 10 year limited warranty and complies with UL217 Standards. Save additionally with the purchase of this bundle.
This alarm is also capable of interconnecting with up to 12 other First Alert or BRK hardwired alarms.
This smoke & fire alarm is for you if:
Where To Place Safety Smoke Alarms:
Recommended replacement for the following obsolete models:
First Alert SA4120B
First Alert SA4121B
First Alert SA4919B
Average Customer Rating Based on 181 reviews:
Smoke Alarm w/Battery Backup - 03/19/2018
Reviewer: Margaret M Wytrwal
Exactly what I had hoped for. Great pricing and quick delivery
Ease of Installation and Price - 01/22/2018
Reviewer: Theodore Taylor
The 3 smoke alarms were much improved over the last ones I bought years ago with respect to being able to insert the alarm into the bracket with ease. Also all the alarms go off in any one of them detects smoke/fire. Would recommend them to anyone seriously interested in their own safety!
happy in safety - 01/18/2018
Reviewer: Dennis Reimink
I changed all of our 14 year old smoke alarms. It took less than 1 hour. We hadn't known the alarms are only good for a defined time.
Thank goodness your local - 01/17/2018
Reviewer: Joe D
Our smoke detectors decided to kick the bucket New Years weekend after 15 long years! We were so glad you were local - we were able to pick up the replacement devices and saved a TON of money versus buying replacement devices from local big box stores. Your staff was so friendly and so accommodating! I hope all of my neighbors buy their replacement devices direct from you when the time comes!
Great service - 01/10/2018
Reviewer: jackie floen
No problem with orders, received exactly what I ordered, prompt delivery.
Reviewer: Kathy Romano
Easily replaced our existing alarms that are no longer working with these.
Reviewer: JoAnn Landry
Reviewer: Ian Montgomery
Replaced a 8 year old unit, fit and worked as expected. Glad they still make this model. Would have been a pain to install another style.
Low price, high quality and easy to install - 12/25/2017
Reviewer: Gangqing Hu
The price for the three sets of 120VAC hardwire alarm I ordered from First Alert beats anywhere else. The shipping was fast and the installation was easy and straightforwards as the model is compatibile with the ones to be replaced in my house.
really good product - 12/19/2017
Reviewer: Eileen Trainer
completely satisfied. Thank you.
Other reasons include: It could be a different device or appliance such as a security system, monitor, carbon monoxide alarm, or other device which has a similar low battery or alert signal. Some of the same factors that cause unwanted alarms can cause intermittent alarms: dust and insects in the alarm or power interruptions in hardwired alarms. Improper wiring on AC or AC/DC smoke alarms. AC alarms will chirp every 5 seconds if the interconnect wire is grounded. The orange interconnect wire should NEVER be grounded; it should only be used to interconnect other smoke alarms or compatible devices.