First Alert SA521CN-3ST Onelink Wireless Hardwired Smoke Alarm

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Walmart #: 001182558
First Alert SA521CN-3ST Onelink Wireless Hardwired Smoke Alarm
$44.48
List price $54.88  (You save $10.40)
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  • Easily link alarms throughout your house
  • One alarm sounds and all other alarms are notified
  • Photoelectric smoke sensor reduces nuisance alarms
  • About this item

      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

      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): 1.5
    Product in Inches (L x W x H): 5.0 x 2.0 x 5.0
    Assembled in Country of Origin: USA or Imported
    Origin of Components: USA or Imported
    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
     
    Show

    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
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    2
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    0
    2 stars
    0
    1 stars
    0
    1-3 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

    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.

    Was this review helpful? (5) (4)
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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.

    Was this review helpful? (1) (0)
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    mxsabino
    Would recommend to a friend? Yes
    1-3 of 5 total reviews See all
    1-3 of 5 reviews

    Customer Reviews | 5 reviews | 4.6 out of 5

    Customer reviews

    4.5 stars
    5 reviews | 4.6 out of 5

    Customer Q&A

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    Product warranty: 10 Years See details

    Supplier Warranty: 10-Year Limited
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