Customer Reviews For The First Alert Wireless Interconnected Hardwired Smoke Alarm - SA521CN-3ST

48 Reviews

4.8 Overall rating

Patrick K
May 6, 2022
Verified Purchase

Devices arrived promptly and in good order the day after they were ordered. Installation was easy using the web site and the included instructions. Thanks First Alert.

Kenneth J
April 26, 2022
Verified Purchase
It's time

They work great easy set up only downside is that they are bulky seem huge

Francis M
April 28, 2021
Verified Purchase

The product was put into operation this past weekend. The system puts together two separate buildings into one . A quick sinking with the help of a technician , was a breeze. Thank You ! Frank MCQUADE. a combo, a Smoke & CO system would be great

Tom Bijak
May 19, 2020
Verified Purchase
Wireless Interconnect

Works as advertised. Shipped as promised.

Shirley Hufford
December 20, 2019
Verified Purchase

This item did what was expected. It allowed us to connect all of our wireless smoke and carbon monoxide detectors together.

Alan Del Rossa
September 25, 2018
Verified Purchase
Smoke alarm

Tested good. Synced to other smoke alarm.

May 31, 2018
Verified Purchase
Works well

It was easy to install since we had older BRK / First Alert units. Connected with the other units flawlessly.

William Rogers
January 5, 2018
Verified Purchase
Awesome product

This product installation is quick and easy. The set up is very labor efficient. This product is loud and will notify you immediately. This is a very good system and needs to be put out to people to let those know about it without alarm systems. Pricing is very reasonable.

Thomas Piorkowski
May 15, 2017
Verified Purchase
Expanded Home System

I had old smoke alarms that I wanted to replace: 2 upstairs, 1 main floor and 1 in the basement. Three I replaced with combo smoke/CO2, the 2nd upstairs unit I purchased a bridge unit to connect the old hard wired to the 4 new battery units. The hardest part was the wired units because the old connectors didn't match any brand of new unit. The detectors came with easy directions and it wasn't that hard. Once set up, all work perfectly together. I like the voice indication, telling you where the fire or co2 issue is located. I am very pleased with the purchase and feel more comfortable with my expanded zone. No extra cost for wiring so although the units are a little more expensive it doesn't cost as much as an electrician!

rick christoffersen
May 15, 2017
Verified Purchase
Great Product

Hardwired systems seamlessly integrated with the multiple First Alert wireless smoke alarms we installed. Now all alarms are integrated throughout our home. Awesome!

rick christoffersen
May 8, 2017
Verified Purchase

Great product. We integrated with 8 other Wireless Smoke Alarms. All linked perfectly together as advertised and we now have comfort of knowing any alarm activation will set off alarms throughout the house.

Charles Hinton
December 16, 2016
Verified Purchase
Had some programming problems

For some reason it was hard to link this one. I have used them before and never had a problem till now. It worked in the end

Barbara Clark
December 5, 2016
Verified Purchase

The quality of this product is very good and responds to my needs.

James Davis
November 22, 2016
Verified Purchase
Easy whole house protection

It was very simple to sync all the smoke alarms in our home. Now we are comforted knowing that if a fire starts in the basement, we will know about it instantly 2 floors above in our bedroom.

Dale Welch
June 27, 2016
Verified Purchase

I spoke with someone in technical support on a Sunday who was extremely helpful in advising me which products to buy to make my house compliant for a house sale. I ordered 5 products. They all arrived on time and in good shape. They were very easy to install and all worked immediately.

Charles Hinton
April 25, 2016
Verified Purchase
Always Works perfect

Always Works perfect

Charles Hinton
March 30, 2016
Verified Purchase
Simple solution

Works perfect

Charles Hinton
January 21, 2016
Verified Purchase
Works everytime

I have purchased many of these and they always work. Easy to program.

Brent Brickett
October 22, 2015
Verified Purchase
Easy to install

This product was very easy to Install and works great.

Patricia Swiger
March 17, 2015
Verified Purchase

I really like the product!!

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