First Alert SM300-AC Interconnect Hardwire Dual Sensor Smoke Alarm – 6-Pack with Battery Backup

Reliable protection for every room

The First Alert SM300-AC Interconnect Hardwire Dual Sensor Smoke Alarm comes in a 6-pack to provide cohesive protection across your home. With a built-in battery backup, these detectors stay alert even when the power is out, helping you maintain peace of mind during unexpected outages.

Smart sensing that matters

Precision Detection technology helps reduce nuisance alarms from everyday activities while staying alert to real smoke. The dual sensor design guards against both slow, smoky conditions and fast-flaming fires, offering balanced coverage for kitchens, living areas, and bedrooms.

Interconnected protection you can rely on

The interconnect feature works with most First Alert and BRK alarms, so when one unit is triggered, all compatible alarms sound together to provide early warning across the home. A Latching Alarm Indicator visually identifies which unit initiated the alert or signaled a low battery.

What you get and practical setup tips

Included in the 6-pack are six hardwired smoke alarms with battery backup, plus all mounting hardware and wiring access needed for quick installation. For best results, place units on each level of your home, near sleeping areas, and in hallways or common areas to maximize coverage.

• Precision Detection reduces nuisance alarms and delivers early warning.
• Dual smoke sensors protect against smoldering and fast flaming fires.
• Interconnects with most First Alert and BRK alarms for synchronized warnings.
• Latching Alarm Indicator quickly shows which unit started the alert or signaled low battery.
• Battery backup maintains protection during power outages.

• Ideal placements include bedrooms, living spaces, hallways, and entryways on each level.
• Weekly testing and regular cleaning help maintain sensitivity and reduce dust-induced false alarms.
• Six-pack packaging makes it convenient for multi-room coverage and future expansions.