First Alert is the name most people trust when it comes to home safety. The SMCO100V-AC takes that reliability and adds a critical upgrade: voice alerts that tell you exactly what the danger is and where it’s happening. Instead of a generic beep that leaves you guessing, you hear “Fire, Master Bedroom” or “Carbon Monoxide, Kitchen.” That clarity saves precious seconds during an emergency.

The unit hardwires into your home’s electrical system with a quick-connect plug, making installation straightforward. A battery backup keeps it running during a power outage. First Alert’s Precision Detection technology helps reduce false alarms from cooking steam or shower humidity, which is a genuine relief in daily use. The alarm meets the latest industry standards for sensitivity and response time.

You can interconnect multiple units to create a whole-home network. When one alarm detects smoke or CO, every connected alarm sounds and speaks the location of the threat. The white finish is unobtrusive, and the voice is clear without being jarring. If you’re replacing old hardwired alarms or building a new system, this is a practical, no-nonsense choice that prioritizes what matters most: knowing what’s happening and where to go.