First Alert SC5 Battery Operated Smart Smoke and Carbon Monoxide Alarm
- Mobile Alerts: Receive instant notifications on your phone via the First Alert app.
- Wireless Interconnect: When one SC5 alarm sounds, all compatible alarms throughout your home will also sound.
- No More Late-Night Chirps: Get notifications when batteries are low.
- Voice Alerts with Location: Know the type and exact location of the danger in your home for quicker action.
- Precision Detection Technology: Equipped with advanced sensors, the SC5 helps reduce nuisance alarms from cooking or steam while still providing an early and accurate warning of real threats.
The First Alert SC5 Battery Smart Smoke and Carbon Monoxide (CO) Alarm brings the trusted fire safety you rely on into the connected age. This 2-in-1 device enhances your home's fire and CO safety, keeping you informed whether you're at home or away. It's also compatible with and replaces Google's Nest® Protect Alarm, offering a seamless transition to smarter protection.
Upgrade to Smart Smoke & CO Detection
Seamlessly integrate the SC5 Battery-Operated Smart Smoke and CO alarm into your home's safety ecosystem if you need to add detection or if it is time to replace. Interconnect when installing so when one alarm sounds, all compatible alarms sound throughout the home to help provide an early warning.
Get Smart Safety Features
This smart 2-in-1 battery-operated alarm offers advanced features and the latest smoke alarm technology. The alarm will sound voice alerts with Heads-Up warning in the event of a fire or CO emergency. Alerts will tell you the type and location of danger in the home to help you escape. The combination alarm will also send mobile alerts through the First Alert app to keep you informed whether home or away.
- 2 -in-1 smoke/fire and carbon monoxide alarm for detection against both threats.
- Sends mobile alerts whether home or away in the event of a fire or CO emergency.
- Voice alerts with Heads-Up warning tell you the type and location of danger in your home.
- Interconnect so when one alarm sounds all compatible alarms sound as one.
- Installation is quick and easy, with hardwire and battery alarm options available.
- Equipped with Precision Detection Technology to help reduce nuisance alarms.
Reduce Alarm Chirps
The SC5 Battery Smart Smoke and CO detector is easy to install and maintain to help ensure your home and family is protected. Test the alarm to ensure it is working properly using the app or the alarm's single test/silence button. The SC5 alarm also provides in-app and audible notices when the alarm needs to be replaced or when the batteries are running low to help eliminate late-night chirps.
Recommended replacement for the following model: Google's Nest Protect Smoke & CO Alarm.




Smart Smoke & Carbon Monoxide Detection
The First Alert App connects what matters most and puts you in control. Connect your smart smoke & CO alarm with the app to check the alarm's status, test alarm's function and receive mobile alerts if smoke and CO are detected.
Downloading the First Alert app is a crucial step to unlock the full potential of your First Alert Smart Smoke and Carbon Monoxide Alarm, transforming basic detection into a comprehensive home safety system. The app serves as your personal command center, delivering critical alerts directly to your smartphone no matter where you are. This means if a smoke or CO event occurs while you're at work, on vacation, or even just in another part of your house, you'll receive an instant notification, allowing for quicker response times and potentially mitigating damage or danger. This remote monitoring capability provides an unparalleled sense of security and peace of mind.
Beyond immediate emergency notifications, the First Alert app significantly enhances the usability and maintenance of your smart alarms. You can easily check the status of your detectors, including battery levels, directly from your phone, eliminating the guesswork and preventing those annoying late-night low-battery chirps. The app also allows for convenient remote testing of your alarms, ensuring they're always functioning optimally without needing to physically reach each unit. This proactive approach to maintenance ensures your home is consistently protected, giving you confidence in your safety system.

To meet certification standards, 2nd gen Nest Protect must be replaced after 10 years from the date of manufacture. When you’ve determined that your device needs to be replaced, you’ll need to select a replacement device, uninstall your Nest Protect, and set up your replacement device.
The First Alert Smart Smoke & Carbon Monoxide Alarm is a compatible replacement for your 2nd gen Nest Protect. Note: First Alert Smart Smoke and Carbon Monoxide Alarm will work with your other Nest Protect devices only in the Google Home app.
First Alert Smoke & CO Alarm Models:
SMCO600NV-AC
SMCO600NV
Google Nest Protect Alarm Models:
Nest Protect Smoke + CO Alarm - Battery and Wired
*Compatibility with Google Nest Protect requires the Google Home app and a Google Account.
- UL Certifications: UL 217 8th Edition & UL 2034 4th Edition
- Sensor Type: Electrochemical, Photoelectric
- Power Source: Battery Operated
- Battery Replaceable: Yes
- Battery Type: 3V Lithium
- Number of Batteries: 6
- Wireless Interconnectivity: Yes
- Sound Level: 85dB at 10 ft.
- Replaces Model: Google's Nest Protect Smoke & CO Alarm
- Warranty: 10 Year Limited
- Product Dimensions (LxWxH): 5.75 x 1.6 x 5.75 in.
- Product Weight: 1 lb.
- Sku: SMCO600NV
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