First Alert SC5 Hardwire Smart Smoke & Carbon Monoxide Alarm

Price: $128.98
(as of Sep 10, 2026 10:46:51 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 Hardwire 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
Battery backup provides continuous protection during power outages
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
Quick Connect Plug allows for easy installation and replacements with no need to rewire
Customers find the smoke alarm easy to install with step-by-step instructions, though compatibility with Google Home is mixed – while some say it integrates well, others report connection issues. The device receives mixed feedback as a replacement, with some considering it a good Nest replacement while others find it unacceptable. Customers report significant reliability issues, with the alarm going off randomly at odd times and waking families multiple times with false alarms. The product receives negative feedback for its poor quality, frequent false alarms, inability to silence alerts, and customers consider it not worth the money.