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First Alert SA521CN(SA520B) ONELINK Hardwired Wireless Photoelectric Smoke Alarm with Battery Backup
First Alert SA521CN(SA520) ONELINK Hardwired Wireless Photoelectric Smoke Alarm with Battery Backup


 
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Description
 
The SA521CN(SA520B) is a Hardwired/Wireless/Photoelectric smoke detector. With the First Alert SA521CN(SA520) you can easily connect the alarm to a network of other smoke alarms through its wireless connection as well as the hardwiring. It works as a bridge unit to connect your existing hardwired alarms and expand with other Onleink Wireless alarms. This 120V AC system can replace any standard fire alarm that is hardwired. You can then expand on your existing hardwired network by Wireless link to any of the other Onelink Wireless Smoke or CO alarms.

SPECS:
OneLink enabled alarm
Bridge Unit - Wireless Photoelectric Hardwired Smoke Alarm
Single button test/silence
Two silence features - can silence the low-battery chirp for up to eight hours or temporarily silence an unwanted nuisance alarm
Add additional OneLink alarms and hardwired alarms. Links all alarms together for a complete system.
Hardwired interconnect and RF Interconnect: reliable and secure radio frequency communication between alarms. 915 MHz frequency with 65,000 security codes and 3 channel frequency hopping.
Optipath 360 TechnologyTM - patented technology provides 360 degrees of direct access to the smoke sensor.
Perfect Mount - allows for easy alignment of alarm
Spread Spectrum Horn Tone - Lower and varying frequency makes it easier for the elderly with normal aged related hearing loss to hear the horn.
Latching Features: Alarm Latch - remembers which unit initiated an alarm. Low Battery Latch: Visually indentifies unit in low battery condition.
10-Years Limited Warranty
Model # SA520
Weight 9.3 oz
Operating Voltage 120V AC with battery backup (Two 1.5V AA Batteries)
Humidity Range 10% to 90% relative humidity (RH)
Smoke Sensor Photoelectric
Listing ETL to UL 217 standard
First Alert Wireless Interconnect Setup

Average Rating: 4.5 of 5 Total Reviews: 47 Write a review »

  0 of 0 people found the following review helpful:
 
Wireless smoke detectors August 15, 2018
Reviewer: Sean Hamel from Southampton, MA United States  
Work great

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  0 of 0 people found the following review helpful:
 
Ummmm April 27, 2018
Reviewer: Adam Weeman from Scarborough, ME United States  
Would you guys send me these things ?

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  0 of 0 people found the following review helpful:
 
Fast/Ontime April 12, 2018
Reviewer: Norman Furrey from Prescott, AZ United States  
Great Service and Quick Delivery

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  0 of 0 people found the following review helpful:
 
First Alert SA521CN Onelink August 26, 2017
Reviewer: Ed from Mansfield, MA United States  
This unit (SA521CN) is replacing the same detector. It's located in a short hallway approximately 10 feet from the kitchen. This unit supports other wireless detectors in the home.
Always have been satisfied with this dectector. Once alerted us to a small smoldering fire in half bath which happened around 3AM.

No one injuries and damage to a minimum.

Thank God

Ed

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  0 of 0 people found the following review helpful:
 
First Alert SA521CN(SA520 May 3, 2017
Reviewer: Edward Eldridge from Constantia, NY United States  
Easy to connect with other types of detectors

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