First Alert

First Alert SMICO105-AC Hardwired 2-in-1 Smoke & CO Alarm – 10-Year Sealed Battery Backup

SKU 1046883
First Alert SMICO105-AC combo smoke & CO alarm with 10-year sealed lithium battery backup. Hardwired. Ionization smoke + electrochemical CO sensors. UL 217 8th Ed. listed. No battery replacement for the life of the alarm.
Technical documents available — View documents
Smoke & CO Combo Ionization + Electrochemical Hardwired + Battery Backup
Request Quote

First Alert SMICO105-AC | 2-in-1 Smoke & Carbon Monoxide Alarm

The First Alert SMICO105-AC (Catalog #1046883) delivers dual-threat protection against both smoke and carbon monoxide in a single, professionally installed device. The sealed 10-year lithium battery means no battery changes for the life of the alarm — just install it and trust it.

Dual-Sensor Protection

  • Ionization smoke sensor — responds rapidly to fast-flaming fires
  • Electrochemical CO sensor — accurately detects dangerous carbon monoxide levels

Professional-Grade Reliability

  • Hardwired connection ensures 24/7 power; 10-year sealed lithium backup activates during outages
  • No battery to replace — worry-free protection for the entire alarm lifespan
  • Easy Adapter Plug included for simple installation in standard wiring boxes
  • 85 dB alarm audible throughout the home
  • Conforms to UL 217 8th Edition Standard
  • 10-Year Limited Warranty

Available in the United States only. Professional installation recommended.