First Alert SA521CN-3ST Onelink Wireless Hardwired Smoke Alarm

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Walmart #: 001182558
First Alert SA521CN-3ST Onelink Wireless Hardwired Smoke Alarm
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$39.95
$39.95
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    120v ac hardwired, easily replace one existing hardwired alarm with Onelink SA521 and then add Onelink battery operated alarms to connect wireless alarms with hardwired alarms--when one sounds, they all sound
  • Battery backup, provides consistent protection for added safety during pow

About this item

Important Made in USA Origin Disclaimer: For certain items sold by Walmart on Walmart.com, the displayed country of origin information may not be accurate or consistent with manufacturer information. For updated, accurate country of origin data, it is recommended that you rely on product packaging or manufacturer information.
    Wirelessly interconnect alarms. 120VAC hardwired wireless interconnect smoke alarm with battery backup. To expand protection to include both existing hardwired alarms and new wireless alarms, simply replace one existing hardwired alarm with Onelink, then add Onelink battery operated alarms elsewhere and when one alarm in either series alarms, all alarms will be notified. Easily link alarms together with the press of a button. When one alarm sounds, they all sound for maximum whole home protection. Photoelectric smoke sensor reduces nuisance alarms from cooking smoke or shower steam. Easy access battery drawer: no need to remove alarm from ceiling to change battery. 10-year limited warranty. Meets UL standards.

About this item

Important Made in USA Origin Disclaimer: For certain items sold by Walmart on Walmart.com, the displayed country of origin information may not be accurate or consistent with manufacturer information. For updated, accurate country of origin data, it is recommended that you rely on product packaging or manufacturer information.

    Wirelessly interconnect alarms. 120VAC hardwired wireless interconnect smoke alarm with battery backup. To expand protection to include both existing hardwired alarms and new wireless alarms, simply replace one existing hardwired alarm with Onelink, then add Onelink battery operated alarms elsewhere and when one alarm in either series alarms, all alarms will be notified. Easily link alarms together with the press of a button. When one alarm sounds, they all sound for maximum whole home protection. Photoelectric smoke sensor reduces nuisance alarms from cooking smoke or shower steam. Easy access battery drawer: no need to remove alarm from ceiling to change battery. 10-year limited warranty. Meets UL standards.

    120v ac hardwired, easily replace one existing hardwired alarm with Onelink SA521 and then add Onelink battery operated alarms to connect wireless alarms with hardwired alarms--when one sounds, they all sound
  • Battery backup, provides consistent protection for added safety during power outages
  • Photoelectric smoke sensing, optimal protection from smoldering fires
  • Reduces false alarms like those caused by cooking fires and shower steam
  • Mute button, mutes unnecessary alarms immediately. also tests alarm function with same button
  • Eco-friendly, completely recyclable as an electronic device
  • EZ access battery door, no need to remove alarm from ceiling to change battery
  • Optional theft-prevention lock, when activated, batteries and/or alarm cannot be removed without proper tools
  • 2AA batteries included
  • Loud 85db alarm
  • 10-year limited warranty
  • Smoke alarms should be replaced every 10 years for maximum protection
  • Meets UL217 standard
  • FCC compliant.

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Specifications

Multi Pack Indicator: No
Model No.: SA521CN-3ST
Shipping Weight (in pounds): 5.6
Product in Inches (L x W x H): 5.0 x 2.0 x 5.0
Walmart No.: 1182558
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Comparison Table

Brand Image
Power Source
Power Source
Sensor Type
Sensor Type
Test/Silence Button
Test/Silence Button
Dual Smoke and Carbon Monoxide Alarm
Dual Smoke and Carbon Monoxide Alarm
Multi-Pack Available
Multi-Pack Available
You are viewing
First Alert Wireless Onelink Smoke and Fire Detector SA521CN-3ST
 
2-AA, Wireless Enabled
2-AA, Wireless Enabled
 
Photoelectric
Photoelectric
 
Yes
Yes
 
 
First Alert 10-Year Tamper-Proof Smoke and Fire Detector SA340CN
 
10-Year Lithium
10-Year Lithium
 
Ionization
Ionization
 
Yes
Yes
 
 
First Alert Wireless Onelink Talking Smoke & Fire Detector, 2-Pack SA511CN2-3ST
 
2-AA, Wireless Enabled
2-AA, Wireless Enabled
 
Photoelectric
Photoelectric
 
Yes
Yes
 
 
First Alert Photoelectric AC/DC Smoke Alarm SA710BPCN
 
9-Volt
9-Volt
 
Photoelectric
Photoelectric
 
Yes
Yes
 
 
First Alert Photoelectric Smoke Alarm SA710CN
 
9-Volt
9-Volt
 
Photoelectric
Photoelectric
 
Yes
Yes
 
 
First Alert Photoelectric Smoke and Fire Detector SA720CN
 
9-Volt
9-Volt
 
Photoelectric
Photoelectric
 
Yes
Yes
 
 
First Alert Hard Wired Smoke Detector and Alarm With Adapter Kit SA9120BPCN
 
9-Volt
9-Volt
 
Ionization
Ionization
 
Yes
Yes
 
 
First Alert Talking Smoke Alarm and Carbon Monoxide Combination Detector SCO7CN
 
2-AA
2-AA
 
Photoelectric
Photoelectric
 
Yes
Yes
 
Yes
Yes
 
Yes
Yes
First Alert Talking Smoke/Fire Alarm and Carbonmoxide Alarm - Child SCO7CN-C
 
2-AA
2-AA
 
Photoelectric
Photoelectric
 
Yes
Yes
 
Yes
Yes
 
Yes
Yes
First Alert Smoke and Carbon Monoxide Alarm Combo Package SCO403
 
2-AA, 1-9V
2-AA, 1-9V
 
Ionization
Ionization
 
Yes
Yes
 
Yes
Yes
 
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Manuals & Guides

Customer Reviews

Customer Reviews | 5 reviews | 4.6 out of 5

4.5 stars

5 reviews | 4.6 out of 5

4.5 stars

5 reviews | 4.6 out of 5

100%
Would recommend to a friend
5 stars
3
4 stars
2
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0
2 stars
0
1 stars
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1-5 of 5 total reviews
100%
Would recommend to a friend

Age

Gender

Being prepared for an unwanted fire...
1/20/2013

Customer review by rfg2

5.0 stars 1/20/2013 by rfg2
by rfg2
Verified purchaser
Verified purchaser
Customer has been confirmed to have purchased the item from Walmart.

Being prepared for an unwanted fire is what these devices do. Being in one room sleeping and not hearing a smoke alarm in another room is what could happen. The Con: If other people in near by residents owning similar devices have these alarms that would affect the alarms in your resident. The device does have the ability to by pass the wireless mode and be wired together using the same fuse circuit. That would be a hassle to do, it does have that capability.

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rfg2
chicago
Would recommend to a friend? Yes
Age:65 or older
Ownership:2 - 7 weeks
Gender:Male
Usage:Every day
Verified purchaser
Verified purchaser
Customer has been confirmed to have purchased the item from Walmart.
With better instuctions it would be excellent
2/19/2009

Customer review by JoeandGlo

4.0 stars 2/19/2009 by JoeandGlo
by JoeandGlo

A very practical way to protect rooms that were not wired into an already built-in smoke alarm system. Worked very well. Instructions need improvement. On testing the units all seem to have a slightly different sound producing a symphony of alerts.

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JoeandGlo
State College, PA
Would recommend to a friend? Yes
Age:65 or older
Ownership:3 - 4 months
Gender:Male
Usage:A few times per year
Used with home automation
11/10/2014

Customer review by mxsabino

5.0 stars 11/10/2014 by mxsabino
by mxsabino

Connected this to my Insteon system using the Insteon Smoke Bridge. All the Insteon modules connect through my Insteon Hub. This First Alert unit coupled with my Insteon system is better and less expensive than NEST. Very happy with how it works.

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mxsabino
Would recommend to a friend? Yes
great alternative to hard wiring
6/15/2013

Customer review by Smokeybee

5.0 stars 6/15/2013 by Smokeybee
by Smokeybee
Verified purchaser
Verified purchaser
Customer has been confirmed to have purchased the item from Walmart.

Excellent for extending existing smoke system. Easy programming.

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Smokeybee
Daytona Beach, Florida
Would recommend to a friend? Yes
Age:45 - 54
Ownership:2 - 7 weeks
Gender:Male
Usage:Every day
Verified purchaser
Verified purchaser
Customer has been confirmed to have purchased the item from Walmart.
Very easy installation
9/3/2014

Customer review by brodeurgd

4.0 stars 9/3/2014 by brodeurgd
by brodeurgd
Verified purchaser
Verified purchaser
Customer has been confirmed to have purchased the item from Walmart.

Awesome

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brodeurgd
essex junction vt
Would recommend to a friend? Yes
Age:45 - 54
Ownership:1 week or less
Gender:Male
Usage:Never
Verified purchaser
Verified purchaser
Customer has been confirmed to have purchased the item from Walmart.

Customer Reviews | 5 reviews | 4.6 out of 5

Customer Reviews

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Customer Q&A

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Product warranty:  10 Years See details

Supplier Warranty: 10-Year Limited
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