First Alert Hardwire Combination Smoke & Carbon Monoxide Alaram

Price: $162.90
(as of Sep 21, 2026 07:59:51 UTC – Details)


Install convenient 2-in-1 protection against both smoke and carbon monoxide with the First Alert SMICO105-AC Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm with 10-Year Battery Backup. Meets new industry standards and can interconnect with other compatible alarms to create a whole home safety network to help provide an early warning.
First Alerts 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
10-Year battery backup provides continuous protection during power outages
Through early warning interconnect, when one alarm sounds, all compatible
Quick Connect Plug allows for easy installation with no need to rewire
Alarm indicator visually identifies the unit that initiated the alarm
Customers find the smoke and carbon monoxide alarm works well, comes with a 10-year battery that doesn’t need replacement, and offers good value for money. The compatibility and fit receive mixed feedback – while many say it connects right into their system and fits old fittings well, others report issues with connectors and size. The noise level, durability, and detection features also get mixed reviews.