First Alert SMI100-AC Interconnect Smoke Alarm – 3-Pack with Battery Backup

Overview

The First Alert SMI100-AC hardwire interconnect smoke alarm with battery backup combines reliable sensing with easy installation. Built to align with current industry standards, this device uses Precision Detection technology to deliver early warnings while aiming to minimize nuisance alarms caused by everyday cooking or steam. Designed to replace existing alarms without rewiring, it can be added to an existing network to help create a coordinated, whole-home alert system.

With its Quick Connect plug, you can install quickly and confidently. The unit also features a battery backup that maintains protection when the power grid fluctuates or outages occur, helping to keep your home protected around the clock.

What makes it stand out

• Easy installation with no rewiring required thanks to Quick Connect plug
• Interconnect capable to create a coordinated whole-home alarm network
• Battery backup ensures continuous protection during power outages
• Visual alarm indicator helps identify the initiating unit at a glance

Smart features in daily life

• Precision Detection sensors help provide early warning while reducing cooking nuisance alarms
• Interconnection ensures alarms sound in sync across compatible devices
• Compact form with straightforward replacement makes upgrading simple
• Reliable power handling and easy maintenance for busy households

Real-world use and benefits

In a multi-story home, having multiple interconnected units can offer a more comprehensive safety net without complicated rewiring. The battery backup keeps the system active during outages, while the visual indicator helps residents quickly locate the activated unit. With a 3-pack, upgrading an entire floor or home section becomes a practical, scalable option for everyday protection that supports peace of mind without overpromising outcomes.