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Best combination smoke carbon monoxide detectors - Holiday Sale 2025

Last Updated - December 14, 2025

1
Best Choice

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

OLUNCLE

6 Packs, 2 in 1,Smoke Carbon Monoxide Detector,Carbon Monoxide Detectors/Smoke Alarm,85 dB Alarm,Large Screen Readout,Test Button,Battery Operated, Work State LED Flash,Easy Install

OLUNCLE

$89.23

More Details
Main highlights
- Visual and Audible Alerts: Featuring 3-color LED indicators and an 85 dB alarm, this detector ensures you’re immediately alerted to potential dangers
- Reliable Sensor Technology: With photoelectric and electrochemical sensors, this smoke detector carbon monoxide detector combo ensures fast and reliable detection of smoke and CO
- Ideal for Home and Office: Whether at home or in the office, this carbon monoxide detectors/smoke alarm provides dependable protection from smoke and CO risks
- Easy-to-Use and Maintain: The simple design allows for quick installation and minimal maintenance, ensuring continuous protection with ease
- Comprehensive Protection: This smoke & carbon monoxide alarms combine the power of two important safety features in one device to protect your family from both smoke and carbon monoxide dangers
$89.23
2
Best Value
26% Off

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Lecoolife
26% Off

4 Pack Combination Smoke and Carbon Monoxide Detector Battery Operated, Travel Portable Photoelectric Fire&Co Alarm for Home, Kitchen

Lecoolife

$59.84

$80.99
(26% Off)

More Details
Main highlights
- Photoelectric sensor detects smoke while minimizing false alarms
- Peace of Mind Protection – Designed to meet your safety needs and provide early warning, helping you protect your family and property.
- Important Safety Note – If the unit is dropped from a high place (such as from the ceiling to the floor), the buzzer component may get disconnected. In this case, the device could produce a continuous sound that does not stop.
- Electrochemical CO sensor alerts you to carbon monoxide danger
- Combo smoke detector/carbon monoxide alarm detects two threats
- Battery-operated unit installs quickly and easily without an electrician，A single button tests the unit or silences the alarm. Low battery signal mute, quiets low battery signal for up to 8 hours
- ARRANTY AND SERVICE: Our products provide after-sales service. If you have any questions about our products, you can contact us, we will reply to you as soon as possible within 24 hours
$59.84
$80.99 (26% Off)
3

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

First Alert

First Alert Combination Smoke & Carbon Monoxide Alarm, Battery Operated Detector with Test & Silence Button, SMCO100, 1-Pack,White

First Alert

$44.99

More Details
Main highlights
- Test/silence button for efficient testing to ensure alarm is working properly
- Provides reliable 2-in-1 protection against both smoke and carbon monoxide
- First Alert's 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
- End-of-life warning lets you know when it’s time to replace the alarm
- Battery-operated alarm allows for easy installation and maintenance
$44.99
4

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

X-Sense

X-Sense 10-Year Battery Combination Smoke Carbon Monoxide Alarm Detector with Large LCD Display (Standalone Model)

X-Sense

$39.99

More Details
Main highlights
- Simple Installation: Requires no rewiring; easy to mount this smoke and carbon monoxide alarm on any wall or ceiling with the included mounting bracket, screws, and anchor plugs
- Please Note: SC07 is a basic standalone unit; it does not support wireless interconnection, does not have Wi-Fi, and cannot be used with a base station; for interconnection, search for SC07-W. For Wi-Fi functionality, look for SC07-WX or SC07-MR
- Informative LCD: Displays real-time CO levels from 30–999 ppm (parts per million) taken from the surrounding air, as well as battery level and working status
- Combination Alarm with CO Readings: When the alarm is triggered, the LCD will display the CO concentration and illuminate. In standby mode, the LCD turns off to ensure you are not disturbed
- 2-in-1 Protection: The combination smoke and CO detector detects both smoke and carbon monoxide faster and more accurately using a photoelectric smoke sensor and an electrochemical CO sensor
- 10-Year Battery: The fire and CO alarm is built with a sealed lithium battery that provides 10 years of continuous power, saving you from changing batteries and power outage
$39.99
5

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

First Alert

First Alert SMCO210, 10-Year Sealed Battery Combination Smoke & Carbon Monoxide Alarm with Slim Profile Design, 1-Pack

First Alert

$39.89

More Details
Main highlights
- Slim profile design is half the depth of a standard alarm
- Provides reliable 2-in-1 protection against both smoke and carbon monoxide in an easy to install alarm
- First Alert's 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.
- End-of-life warning lets you know when it’s time to replace the alarm
- 10-Year sealed battery eliminates battery replacements and low battery chirps for the life of the alarm
$39.89

Best combination smoke carbon monoxide detectors - Holiday Sale 2025

6 Packs, 2 in 1,Smoke Carbon Monoxide Detector,Carbon Monoxide Detectors/Smoke Alarm,85 dB Alarm,Large Screen Readout,Test Button,Battery Operated, Work State LED Flash,Easy Install

4 Pack Combination Smoke and Carbon Monoxide Detector Battery Operated, Travel Portable Photoelectric Fire&Co Alarm for Home, Kitchen

First Alert Combination Smoke & Carbon Monoxide Alarm, Battery Operated Detector with Test & Silence Button, SMCO100, 1-Pack,White

X-Sense 10-Year Battery Combination Smoke Carbon Monoxide Alarm Detector with Large LCD Display (Standalone Model)

First Alert SMCO210, 10-Year Sealed Battery Combination Smoke & Carbon Monoxide Alarm with Slim Profile Design, 1-Pack

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