First Alert - Standard Battery-Operated Smoke and CO Alarm 2 Pack Models SMI100 and CO400 - White
Reviews coming soon
About this product
Install reliable fire and carbon monoxide (CO) protection with this First Alert® Value Safety 2 Pack. It includes the SMI100 battery-operated smoke alarm and the CO400 battery-operated carbon monoxide alarm. The SMI100 Smoke Alarm features the First Alert® Precision Detection advanced-sensing technology that meets the latest industry standards to reduce cooking nuisance alarms, detect smoke from synthetic materials, and provide early warning in the event of a home fire emergency. The CO400 carbon monoxide alarm utilizes an electrochemical carbon monoxide sensor - the most accurate sensor available - to detect carbon monoxide. Both are battery operated, easy to install, have convenient test/silence buttons, front-access battery doors for easy battery replacement, and will work in the event of a power outage.
Features
Dual Protection
Includes one smoke alarm and one carbon monoxide alarm to help keep your home safe from fire and CO hazards
Advanced Smoke Detection
Features Precision Detection technology that reduces nuisance alarms and detects fast-burning synthetic smoke for early warning
Accurate CO Sensing
Uses an electrochemical sensor for reliable carbon monoxide detection and safety
Battery Operated
Both alarms run on 9-volt batteries, ensuring operation during power outages and easy replacement through front-access doors
Loud Alarm Sound
Alarms emit 85 dB sound at 10 ft to alert you effectively in emergencies
Specifications
- Detector TypeCarbon monoxide, SmokeSensor TypeElectrochemical, IonizationPower SourceBattery-poweredNumber of Devices Included2
Reviews
This product doesn't have any reviews yet.
Compare similar products

Install reliable fire and carbon monoxide (CO) protection with this First Alert® Value Safety 2 Pack. It includes the SMI100 battery-operated smoke alarm and the CO400 battery-operated carbon monoxide alarm. The SMI100 Smoke Alarm features the First Alert® Precision Detection advanced-sensing technology that meets the latest industry standards to reduce cooking nuisance alarms, detect smoke from synthetic materials, and provide early warning in the event of a home fire emergency. The CO400 carbon monoxide alarm utilizes an electrochemical carbon monoxide sensor - the most accurate sensor available - to detect carbon monoxide. Both are battery operated, easy to install, have convenient test/silence buttons, front-access battery doors for easy battery replacement, and will work in the event of a power outage.

The First Alert® SMICO110 10-Year Battery Smoke and Carbon Monoxide Alarm provides reliable 2-in-1 protection against both fire and carbon monoxide in an easy-to-install detector. Featuring superior safety features like a 1-touch test/silence button to confirm the combination alarm is functioning correctly and silence false alarms, the combination alarm features a built-in 10-year sealed battery that provides uninterrupted power for the life of the detector. No need to worry about the cost or hassle of battery replacements for a decade. An end-of-life warning lets you know when the alarm should be replaced.

Install the First Alert SM210 10-Year Sealed Battery Smoke Alarm & CO400 Battery-Operated Carbon Monoxide Alarm Safety Value Pack for protection against fire and carbon monoxide (CO). The SM210 Smoke Alarm features First Alert's Precision Detection advanced sensing technology and meets new industry standards to reduce cooking nuisance alarms and provides early warning in the event of a home fire emergency.

Designed with photoelectric smoke sensing, a sealed 10-year battery, and voice alerts to provide clear notification when smoke is detected. The long-life power source reduces maintenance, while audible voice messaging helps communicate alarm conditions quickly for added household awareness.
Specs
Be the first to ask a question.
We’ll try to get your question answered within 24 hours by a Best Buy customer or brand representative.









































