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First Alert SA521CN(SA520B) Hardwired Wireless Photoelectric Smoke Alarm with Battery Backup
First Alert SA521CN(SA520) Hardwired Wireless Interconnect 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 Wireless Interconnect Smoke or CO alarms.

SPECS:
Wireless Interconnect 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 Wireless Interconnect 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: Average Rating: 5 of 5 5 of 5 Total Reviews: 55 Write a review »

  0 of 0 people found the following review helpful:
 
5 of 5 Inspector required, SmokeAlert provided September 15, 2020
Reviewer: Keith from Kirkwood , MO United States  
I needed a hardwired component to my wireless interconnected system.  SmokeAlert had exactly what I needed at a great price!  Do your research and you’ll find smokealert.net is a great choice!

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  0 of 0 people found the following review helpful:
 
5 of 5 Consistent June 12, 2020
Reviewer: John from Columbia, SC United States  
When I need alarms quick I place an order and the units arrive almost always in 2 business days.
They are close by in a neighboring state, but there are never any problems.

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  0 of 0 people found the following review helpful:
 
5 of 5 Fast responce May 14, 2020
Reviewer: Paul Grimm from Catonsville, MD United States  
Fast shipping. Thank you.

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5 of 5 May 14, 2020
Reviewer: Michael Lancaster from Garden City, GA United States  


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  0 of 0 people found the following review helpful:
 
5 of 5 Hardwired and wireless link smoke alarms February 24, 2020
Reviewer: Anonymous Person from Glenshaw, PA United States  
I ordered 3 hard wired and wireless linked smoke alarms which were very difficult to find that did not have Alexa on them.  All three were at a very reasonable price, cam when promised and were very easy to setup and install.  They even came with bibs to cover when cleaning, painting or remodeling so no dust and dirt enters into the alarm.  Nice touch!

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