[shortdesc] Alarm Type Smoke Alarm Power Source Hardwired Sensor Ionization Interconnects Yes Battery Backup Factory-Locked 10-Year Lithium Battery [/shortdesc] 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. === 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