First Alert SC5 Battery Smart Smoke & Carbon Monoxide Alarm

Price: $129.94
(as of Sep 12, 2026 03:06:09 UTC – Details)


The fire safety you trust is now connected and compatible. Add smart fire safety alerts to your home with the First Alert SC5 Battery Smart Smoke and Carbon Monoxide (CO) Alarm. This 2-in-1 device elevates your home’s fire and CO safety whether home or away.
Compatible with Google’s Nest Protect Alarm
Sends alerts to your phone if smoke and CO are detected through the First Alert app
Interconnect so when one alarm sounds, all compatible alarms in the home sound
Notifies when the batteries are low, eliminating late night chirps
Voice alerts with Heads-Up warning tells you the type and location of danger in your home
Equipped with Precision Detection Technology to help reduce nuisance alarms and provide an early warning
Customers report that the smoke and carbon monoxide alarm produces false alarms multiple times and has subpar quality. Moreover, the device is expensive and customers feel unsafe using it. Additionally, while it integrates well with Google Home, some customers mention connectivity issues with WiFi. The alarm lacks features like a path light, and customers find it inferior to the Nest Protect model.