First Alert Hardwire Combination Smoke & Carbon Monoxide Alarm

Price: $150.71
(as of Oct 17, 2026 11:30:57 UTC – Details)


The SMICO100-AC Interconnect Hardwire 2-in-1 Smoke & CO Alarm with Battery Backup utilizes First Alert’s Precision Detection technology and meets new industry standards. Easily install and interconnect multiple alarms together to create an alarm system throughout your home.
First Alert’s Precision Detection advanced sensing technology complies with new industry standards to reduce cooking nuisance alarms and provides early warning in the event of a home fire emergency
Through early warning interconnect, when one alarm sounds, all compatible* alarms will sound
Quick Connect Plug allows for easy installation with no need to rewire
Battery backup provides continuous protection during power outages
Test/silence button for efficient testing to ensure alarm is working properly
The date shown on the product is the Manufacture Date, which identifies when the product was produced
Customers find the smoke and carbon monoxide alarm easy to install and consider it a good replacement for expired versions. The product receives mixed feedback regarding its reliability, with some units working great while others malfunction after a month of use. Customers disagree on the value for money, with some finding it worth the price while others consider it overpriced. The fit and wiring compatibility also receive mixed reviews – while some say it fits perfectly, others report issues with the plug being too tight or impossible to connect. The accuracy of the alarms is a concern, with customers reporting false alarms and defective units.