SKU: 1039831

Regular price $69.99

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The First Alert SA500A Wireless Interconnect Battery Smoke Alarm allows you to create an interconnected fire alarm system without the cost and hassle of wiring. Use this smoke detector to replace an existing smoke alarm and then install additional First Alert Wireless alarms for an interconnected safety network (additional alarms sold separately). This battery operated smoke detector can connect and communicate with up to 18 compatible alarms, so when one alarm is triggered, the entire system reacts. An integrated battery backup ensures the smoke alarm continues to work even during power outages.

Create an Interconnected Fire Safety System

The First Alert SA500A Wireless Interconnect Battery Smoke Alarm makes it easy to begin creating a safety network of detection. This model is designed to replace an existing hardwired 120-volt alarm so you can add up to 18 First Alert Wireless Interconnected alarms and get expanded protection. By connecting multiple Wireless Interconnected alarms, you can be alerted to danger on the other side of your house before the smoke from that area reaches you. When one alarm sounds, all connected alarms in the system will sound simultaneously. Earlier notification of danger means you can escape sooner.

Comprehensive Warning Features

The smoke alarm features an 85-decibel siren that is designed to wake even the soundest of sleepers. This smoke detector uses a photoelectric sensor that is designed to detect the presence of smoke, while minimizing false alarms from cooking smoke and shower steam.


Model SA500A
Sensor Type Photoelectric
Sensor Information Smoke particles of varying number and size are produced in all fires. For maximum protection, use both ionization and photoelectric sensing technologies. Ionization alarms are generally more sensitive to fast flaming fires and photoelectric alarms are generally more sensitive to smoldering fires.
Power Source Battery Operated
Battery Size AA
Sound Level 85dB at 10 feet
Product Height 2.38 in, 60 mm
Product Length 5.13 in, 135 mm
Product Width 5.13 in, 135 mm
Product Weight 0.65 lb, 0.3 kg
UPC Number 029054018977
Warranty 10 Years Limited
Features End-of-Life Warning, Wireless Interconnectivity
Type Smoke Alarm