First Alert hardwired smoke and carbon monoxide alarm SMCO100V — voice/location alerts, battery backup

The First Alert SMCO100V is a hardwired smoke and carbon monoxide combo alarm that uses voice and location alerts plus battery backup to identify the type and location of danger.

This dual-sensor alarm combines smoke and CO detection in one unit, designed to be wired into your home's electrical system while keeping protection during outages through a replaceable battery backup. It features voice prompts that announce the hazard and its location, interconnect capability so all compatible alarms sound together, and an easy quick-connect plug for faster installation. First Alert's Precision Detection sensing improves nuisance alarm resistance while still meeting current industry standards.

How does the voice and location alert help during an emergency?

The alarm speaks the type of danger and the room or zone to help occupants react quickly and with less guesswork. Clear spoken messages reduce confusion in noisy or multi-story homes and can guide occupants toward safer exits.

• Voice announces "fire" or "carbon monoxide" plus location
• Distinct spoken prompts reduce search time in large homes
• Helpful for children, guests, or people with limited sight

What makes the sensing technology different from older alarms?

First Alert's Precision Detection is tuned to recognize real hazard signatures while reducing false alarms from routine cooking. It uses updated sensing algorithms and thresholds that comply with newer industry standards so the alarm responds appropriately to developing fires and elevated CO levels.

• Advanced sensing cuts down on nuisance alerts from cooking
• Complies with updated detection standards for improved response
• Dual-sensor design detects both smoke particles and CO gas

Can this unit be connected to other alarms and how does installation work?

The SMCO100V supports interconnect so when one compatible alarm activates, all linked units will sound to give whole-home notification. Installation is simplified with a quick-connect plug that avoids rewiring, and the unit still relies on a battery backup to protect during power outages.

• Interconnect compatibility creates synchronized alerts across devices
• Quick Connect Plug enables faster replacement or installation
• Battery backup keeps the alarm working if AC power is lost

How should I maintain this alarm to ensure reliability?

Regular testing and periodic battery replacement keep the unit operational; follow the manufacturer’s schedule for cleaning and replacement. Dust or paint buildup can impair sensors, so inspect the alarm visually and perform monthly tests using the test button.

• Test the alarm monthly using the test button
• Replace backup battery at intervals recommended by First Alert
• Keep the unit free from dust, debris, and paint obstructions

Who is this for: The First Alert SMCO100V is intended for homeowners and renters who want combined smoke and carbon monoxide detection with audible and spoken alerts, simplified hardwire installation, and whole-home interconnect capability. It's a practical choice for multi-level houses, families with children or older adults, and anyone seeking reduced nuisance alarms without sacrificing early warning features.