Security

SA521CN-3ST Interconnected Smoke Alarm with Hardwire Adapter Included

SKU: SA521CN-3ST

Roll over image to zoom

SA521CN-3ST Interconnected Smoke Alarm with Hardwire Adapter Included

SKU: SA521CN-3ST

The First Alert SA520 Interconnected Smoke Alarm with Hardwire Adapter Included allows you to create an interconnected fire alarm system without the hassle of rewiring. Use this smoke detector to replace an existing hardwired smoke alarm and then install additional First Alert wireless detectors for an interconnected safety network (additional detectors sold separately). This hardwired smoke and fire detector can connect and communicate with up to 18 compatible alarms, so when one is triggered, the entire system will sound. Equipped with battery backup, this smoke and fire alarm provides continuous protection during power outages.

When one alarm is triggered, all connected alarms will sound
Battery backup provides continuous detection during power outages
Hardwired smoke detector can communicate wirelessly with other compatible alarms to create a fire alarm system (additional alarms sold separately)

Select a Model:

Product Overview

Create an Interconnected Fire Safety System

The First Alert Interconnected Smoke Alarm with Hardwire Adapter Included makes it easy to begin creating a safety network of detection. This detector is designed to replace an existing hardwired 120-volt alarm so you can add up to 18 First Alert wireless interconnected alarms - by connecting multiple wireless interconnected detectors, you can be alerted to danger on the other side of your house before the smoke from that area reaches you. When one detector sounds, all connected alarms in the system will sound simultaneously.

Hardwired Smoke Alarm

The interconnected smoke alarm is designed to easily replace most existing 120-volt hardwired detectors. Equipped with an easy adapter plug, there is no need to rewire when installing the fire alarm. Also, in case of power outages, the smoke detector has a battery backup feature designed to ensure continuous protection. A low-battery light and chirp will let you know when the AA batteries need to be replaced in the smoke detector.