First Alert SA511CN2-3ST


Wireless Interconnected Smoke Alarm with Voice Location, Battery Operated, White, Pack of 2

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  • Factory New
Brand: First Alert Part #: 151154 Categories: , Manufacturer Part #: SA511CN2-3ST


First Alert’s series of Wireless Battery-Operated Smoke Alarms effectively eliminates the need for a wired connection and operates entirely on batteries. The latest advancement in a series celebrated for its intuitive use of technology, the First Alert Wireless Interconnect collection offers an abundance of options when it comes to creating the ideal safety network. Wireless inter-connectivity allows you to connect up to 18 alarms (a maximum of 12 smoke alarms and 6 carbon monoxide alarms) within your home! Should one First Alert Wireless Interconnect alarm sound off, the remainder of your Wireless Interconnect alarms will also trigger simultaneously and alert you and your home to any potential dangers. The communication distance (range) between any two First Alert Wireless Interconnect Alarms is typically 50 ft. (15 meters) inside of a home. Some features of a home, such as the number of floors, number/size of rooms, furniture and types of building materials used may reduce the range of wireless interconnect alarms. This feature allows for the maximum in whole home protection.


Weight 0.63 lbs
Dimensions 5.00 × 5.00 × 2.00 in

First Alert



Unit of Measurement

PK (Pack)

Production Status



  • When one alarm is triggered, all connected alarms will sound
  • Integrated battery backup allows continuous detection during power outages
  • Photoelectric sensor detects smoke with reduced false alarms
  • One button silences a false alarm and tests the smoke detector
  • Eco-friendly, completely recyclable as an electronic device
  • EZ access battery door, no need to remove alarm from ceiling to change battery
  • Loud 85db alarm

Wireless OneLinkAC Powered Smoke Alarm with Battery Back-up

First Alert - Data Sheet