First Alert SM300-AC Interconnect Hardwire Dual Sensor Smoke Alarm with Battery Backup | 1-Pack

Reliable early warning with dual-sensor technology

The First Alert SM300-AC is a hardwired smoke alarm designed to protect modern homes. Its dual sensor system targets both slow-smoldering and fast-flaming fires, while reducing nuisance alarms often caused by cooking or steam. This 1-pack model emphasizes dependable coverage for single rooms or small to mid-sized living spaces without adding excessive maintenance steps.

Key features work together to give you space to react. Precision detection helps distinguish smoke events from ordinary household activity, and the interconnect capability links compatible alarms so one alert can become a coordinated home-wide warning. When an alarm sounds, a latching indicator clearly identifies the unit that triggered the alert, helping you respond quickly and locate the source. A built-in battery backup ensures continued protection during power outages, providing peace of mind when the lights go out.

Why homeowners consider this unit

• Dual smoke sensors guard against both smoldering and flaming fires for broader coverage.
• Interconnects with most First Alert and BRK alarms so multiple units sound together for early notice.
• Latching Alarm Indicator helps you identify the initiating unit at a glance.
• Battery backup maintains protection during power outages, reducing gaps in coverage.
• Test/Silence button enables quick checks and temporary silencing for up to 8 hours.

Practical placement and everyday use

Placed in hallways, living rooms, kitchens, or bedrooms, the SM300-AC blends into ceilings with a compact profile that supports discreet installation across multiple rooms. The 1-pack format makes it suitable for primary protection in smaller homes or apartments, while the interconnect feature scales with additional compatible alarms if you expand your setup.

What to expect in use

In daily life, you may notice a quick audible alert during testing or routine cooking, followed by a clear signal if smoke is present. The silencing option provides temporary relief from routine activations while you assess the situation, and the interconnect network helps families receive timely notification across rooms. This model emphasizes proactive safety without promising specific results, instead offering listed capabilities as possibilities for enhanced awareness.