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Alarm Type	Smoke Alarm
Power Source	Hardwired
Sensor	Ionization
Interconnects	Yes
Battery Backup	Factory-Locked 10-Year Lithium Battery

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BRK SMI105-AC Smoke Alarm

Advanced AC-Powered Smoke Alarm with 10-Year Backup

The BRK SMI105-AC delivers reliable protection with advanced ionization sensing technology for early smoke detection. Designed with a 10-year factory-locked lithium battery backup, it ensures continuous security during power outages. This alarm features interconnect capability, enabling up to 18 compatible units to sound simultaneously for comprehensive coverage throughout your home. Its latching alarm indicator highlights the source of activation for easy identification. The SMI105-AC is a high-performing, durable option for enhanced home safety.

Key Features

10-Year Battery Backup: Factory-locked, tamper-resistant lithium battery ensures uninterrupted backup.
Advanced Smoke Detection: Ionization sensor provides earlier warning with minimal nuisance alarms.
Interconnectable System: Link up to 18 compatible BRK and First Alert alarms for full-scale alerting.
Test & Silence Button: One-touch button to test functionality or silence nuisance alarms.
Latching Alarm Indicator: Easily identify the alarm that initiated activation, improving safety responses.

Specification	Details
Model	SMI105-AC
Part Number	1046850
Power Source	AC Powered with 120V AC, 60Hz
Battery Backup	Factory-Locked 10-Year Lithium Battery
Sensor Type	Ionization
Alarm Dimensions	5.58" Diameter x 1.99" Height
Weight	0.47 lb
Operating Temperature	40°F (4°C) to 100°F (37.8°C)
Humidity Range	10% to 95% Relative Humidity (non-condensing)
Audio Alarm	85dB at 10 Feet
Interconnections	Up to 18 Units (12 Smoke Alarms, 6 CO or Heat Alarms)
Indicator LED Lights	AC Power: Steady Green DC Power: Flashes Green Every Minute Smoke Alarm: Flashes Red in Sync with Alarm Latching Alarm: Flashes Red Every 2 Seconds After Alarm Low Battery/Malfunction: Audible Chirps
Certifications	UL217
Special Features	Test/Silence Button Auto Reset After Smoke Clears Tamper-Resistant Locking Pins Gasketless Base for Easy Installation Latching Alarm Indicator

All BRK Electronics smoke alarms meet UL 217 standard and are listed with the California State Fire Marshal. They use the new UL mandated repeating 85-decibel alarm horn pattern. 10-year limited warranty. For a full list of states and cities requiring 10 Year alarms click here.

Don't know what type of smoke and carbon monoxide alarm is right for your home? Check out our guide on how to choose the right smoke detector for your home.

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In The Box

1 Smoke & Carbon Monoxide Alarm
1 Mounting Bracket
1 Dust Cover
1 English/ Spanish Instructions Manual

Info & Guides

User Manual	Download
Specification Sheet	Download

BRK SMI105-AC Smoke Alarm – Hardwired with Ionization Sensor and 10 Year Battery Backup