Updated:March, 2026

10 Best Carbon And Smoke Detector Combo of 2026

Best Choice

9.9

Outstanding

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

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Why We Love It

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
Reliable Sensor Technology: With photoelectric and electrochemical sensors, this smoke detector carbon monoxide detector combo ensures fast and reliable detection of smoke and CO
Visual and Audible Alerts: Featuring 3-color LED indicators and an 85 dB alarm, this detector ensures youre immediately alerted to potential dangers
Easy-to-Use and Maintain: The simple design allows for quick installation and minimal maintenance, ensuring continuous protection with ease
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

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Why We Love It

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
Reliable Sensor Technology: With photoelectric and electrochemical sensors, this smoke detector carbon monoxide detector combo ensures fast and reliable detection of smoke and CO
Visual and Audible Alerts: Featuring 3-color LED indicators and an 85 dB alarm, this detector ensures youre immediately alerted to potential dangers
Easy-to-Use and Maintain: The simple design allows for quick installation and minimal maintenance, ensuring continuous protection with ease
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

How We Find the Top Picks

We use smart data tools to review thousands of products and stores, analyzing ratings, reviews, and popularity trends to highlight what truly matters to shoppers like you.

Our experts then refine the results, blending AI insights with real user experiences to deliver accurate, up-to-date rankings that help you choose with confidence.

9.5

Excellent

First Alert

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

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Main Highlights

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
Provides reliable 2-in-1 protection against both smoke and carbon monoxide
Battery-operated alarm allows for easy installation and maintenance
Test/silence button for efficient testing to ensure alarm is working properly
End-of-life warning lets you know when its time to replace the alarm

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Main Highlights

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
Provides reliable 2-in-1 protection against both smoke and carbon monoxide
Battery-operated alarm allows for easy installation and maintenance
Test/silence button for efficient testing to ensure alarm is working properly
End-of-life warning lets you know when its time to replace the alarm

9.5

Excellent

LEMONTAIL

Smoke and Carbon Monoxide Detector with Batteries,2-in-1 Smoke Detector Carbon Monoxide Detector Combo,Smoke and Carbon Monoxide Alarm with Test Button and Digital Display

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Main Highlights

Dual Sensors: This combination smoke carbon monoxide alarm detects both smoke and carbon monoxide. It's working method: a high sensitivity photoelectric sensor to detect smoke and high stability electrochemical co sensor to detect carbon monoxide. They are separate, no matter which sensor is triggered because of dangerous concentration, this smoke and carbon monoxide detector will beep and blink with red led
Loud Beep: This smoke alarm has a louder than 85 decibels beep with red LED flashing. It is loud enough to let you know the danger and take ation to avoid it quickly. It is recommended to install more than one in your house for a maximum protection
Red or Green Led function: Once smoke or carbon monoxide reaches their dangerous concentration, this smoke and carbon monoxide detector will go off and blink with red led. Red led and beep also let you know if batteries need to be replaced or not(capacity of battery is less than 3.6V). Green led with beep will work for test button to show fire alarm's different working status
Readable Digital Display: when smoke or CO concentration reaches their dangerous level, the screen of fire alarm smoke detector will show the CO or smoke concentration and illuminate.STANDBY MODE: screen light will not be on under standby mode, so this will not disturb your sleeping. When this fire alarm smoke detector enters standby mode, its green led will blink about every 60s
Green Led Too Bright? : If you feel that the green led is too bright, it is recommended to cover with a transparent pvc until you feel good. This carbon monoxide detectors smoke alarm is easy to install. Both wall and ceiling are suitable for installation

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Main Highlights

Dual Sensors: This combination smoke carbon monoxide alarm detects both smoke and carbon monoxide. It's working method: a high sensitivity photoelectric sensor to detect smoke and high stability electrochemical co sensor to detect carbon monoxide. They are separate, no matter which sensor is triggered because of dangerous concentration, this smoke and carbon monoxide detector will beep and blink with red led
Loud Beep: This smoke alarm has a louder than 85 decibels beep with red LED flashing. It is loud enough to let you know the danger and take ation to avoid it quickly. It is recommended to install more than one in your house for a maximum protection
Red or Green Led function: Once smoke or carbon monoxide reaches their dangerous concentration, this smoke and carbon monoxide detector will go off and blink with red led. Red led and beep also let you know if batteries need to be replaced or not(capacity of battery is less than 3.6V). Green led with beep will work for test button to show fire alarm's different working status
Readable Digital Display: when smoke or CO concentration reaches their dangerous level, the screen of fire alarm smoke detector will show the CO or smoke concentration and illuminate.STANDBY MODE: screen light will not be on under standby mode, so this will not disturb your sleeping. When this fire alarm smoke detector enters standby mode, its green led will blink about every 60s
Green Led Too Bright? : If you feel that the green led is too bright, it is recommended to cover with a transparent pvc until you feel good. This carbon monoxide detectors smoke alarm is easy to install. Both wall and ceiling are suitable for installation

9.2

Excellent

Kidde

Kidde Smoke & Carbon Monoxide Detector, AA Battery Powered, LED Warning Light Indicators, 2 Pack

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Main Highlights

2-IN-1 DETECTION: Alerts you to both smoke & carbon monoxide (CO) using a single, cost-effective detector.
ENHANCED SENSING TECHNOLOGY: Reduces false smoke alarms often caused by cooking. Comprehensively tested to meet the latest UL standards, meets UL 217 9th Edition, UL 2034 4th Edition, & FCC standards.
NO WIRING NEEDED: Operates on 2-AA alkaline batteries (included) providing easy installation, simply mount the bracket onto the ceiling and twist & click the 5-inch smoke & CO alarm into the bracket.
SELF-TESTING ALARM: Internal components ensure alarm is always operating as expected. Not a substitute for a manual push test, perform a button test once per week to verify alarm operation.
3 LED NOTIFICATIONS: LED lights indicate alarm status, green = normal operation, amber = operating error, red = smoke or carbon monoxide detected & a loud 85-decibel alarm will sound.
TEST & HUSH BUTTON: Makes it easy to test the 5-inch combination detector and silence false alarms, should they occur.
BATTERY REPLACEMENT: Batteries should be replaced every 6 months, a low battery chirp alerts you when batteries need replacing.
10-YEAR LIMITED WARRANTY: Warranty begins when the alarm is powered on. If that date is unknown, it should be assumed that alarms should be replaced.

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Main Highlights

2-IN-1 DETECTION: Alerts you to both smoke & carbon monoxide (CO) using a single, cost-effective detector.
ENHANCED SENSING TECHNOLOGY: Reduces false smoke alarms often caused by cooking. Comprehensively tested to meet the latest UL standards, meets UL 217 9th Edition, UL 2034 4th Edition, & FCC standards.
NO WIRING NEEDED: Operates on 2-AA alkaline batteries (included) providing easy installation, simply mount the bracket onto the ceiling and twist & click the 5-inch smoke & CO alarm into the bracket.
SELF-TESTING ALARM: Internal components ensure alarm is always operating as expected. Not a substitute for a manual push test, perform a button test once per week to verify alarm operation.
3 LED NOTIFICATIONS: LED lights indicate alarm status, green = normal operation, amber = operating error, red = smoke or carbon monoxide detected & a loud 85-decibel alarm will sound.
TEST & HUSH BUTTON: Makes it easy to test the 5-inch combination detector and silence false alarms, should they occur.
BATTERY REPLACEMENT: Batteries should be replaced every 6 months, a low battery chirp alerts you when batteries need replacing.
10-YEAR LIMITED WARRANTY: Warranty begins when the alarm is powered on. If that date is unknown, it should be assumed that alarms should be replaced.

9.0

Excellent

OLUNCLE

4 Pack Smoke and Carbon Monoxide Detector with Test Button, 85dB Loud Beep, LCD Display, Battery-Operated Smoke Detector Carbon Monoxide Detector Combo for House, Apartment, Kitchen, Garage Use

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Main Highlights

Equipped with advanced photoelectric and electrochemical sensors, this smoke and carbon monoxide detector responds swiftly to both slow-burning fires and harmful carbon monoxide gas. It's designed for early warning for your family day and night
The large LCD of smoke detector shows real-time carbon monoxide levels when CO is detected. In standby mode, the screen stays off to save energy while the green LED blinks once every 60 secondsensuring normal function without disturbing your rest
This smoke detector carbon monoxide detector combo delivers an audible alert louder than 85dB along with flashing red LED signals when smoke or CO reaches hazardous levelsgiving you time to react fast in emergencies
Three indicator lights of smoke alarm keep you informed: green for normal operation, red for smoke/CO alerts and low battery warnings, and yellow to show fault status. Stay in control with clear visual signals anytime
Use the convenient test button to check the battery and alarm functions of your combination smoke carbon monoxide alarm detector. Recommended for bedrooms, basements, kitchens, and living spaces for complete home coverage

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Main Highlights

Equipped with advanced photoelectric and electrochemical sensors, this smoke and carbon monoxide detector responds swiftly to both slow-burning fires and harmful carbon monoxide gas. It's designed for early warning for your family day and night
The large LCD of smoke detector shows real-time carbon monoxide levels when CO is detected. In standby mode, the screen stays off to save energy while the green LED blinks once every 60 secondsensuring normal function without disturbing your rest
This smoke detector carbon monoxide detector combo delivers an audible alert louder than 85dB along with flashing red LED signals when smoke or CO reaches hazardous levelsgiving you time to react fast in emergencies
Three indicator lights of smoke alarm keep you informed: green for normal operation, red for smoke/CO alerts and low battery warnings, and yellow to show fault status. Stay in control with clear visual signals anytime
Use the convenient test button to check the battery and alarm functions of your combination smoke carbon monoxide alarm detector. Recommended for bedrooms, basements, kitchens, and living spaces for complete home coverage

8.8

Very Good

Yfwsrecinoe

Yfwsrecinoe 2 Pack Upgraded Combination Smoke and Carbon Monoxide Alarm Detector, Dual Sensor Smoke Alarm&Carbon Monoxide Detector (Includes Battery)

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Main Highlights

Upgraded Dual Sensors to Ensure Your Safety: Compared with most carbon monoxide smoke detectors on the market, our detector sensors have a lifespan of up to 10 years, while other detectors on the market only use three-years life sensors, so our products have a longer service life. The combined smoke and carbon monoxide detector uses a photoelectric smoke sensor and an electrochemical sensor to detect smoke and carbon monoxide faster and more accurately, protecting your home from two potentially deadly threats.
LCD Digital Displays & Multi-directional Sensing Hole: The informative LCD will show you the battery level and real-time CO levels in PPM (parts per million). If there is fire and carbon monoxide with a concentration over 0.1% db/m, the blue light flashes rapidly. If CO is detected, the red light will flash. Dense gas-sensing holes can prevent alarms from causing false alarms and reduce your worries.
Battery-Operated&Easy Installation:This CO alarm is powered by large capacity 3x1.5V AA batteries (included), and this combination smoke and carbon monoxide detector can be easily installed using the included mounting bracket, screws, and anchors. The detector's battery life is up to five years, and we also provide a lifetime free battery replacement service to save you money.
Test Mode Button and Loud Alarm: It allows you to easily know the working status of the smoke detector and carbon monoxide detector. You can press the test button to inspect the alarm weekly. Alarm Volume: Loud>85dB at 3 meters. The loud 85-decibel alarm is designed to be heard easily. When encountering a non-emergency situationfalse alarms occur), you can immediately press the test button and the LED light will flash 10 seconds, indicating that it has entered the silent mode.
Safety Guarantee and High Quality: This product has passed the UL standard report issued by the laboratory accredited by ILAC ISO 17025/NRTL standard. We have complete testing report of UL217 and UL2034. Protect yourself and your family from the silent danger of carbon monoxide with our top-of-the-line Carbon Monoxide Detectors. With its advanced detection capabilities, our Carbon Monoxide Detectors offer you an added layer of security and peace of mind. If you have any questions about Yfwsrecinoe smoke and carbon monoxide detectors, please feel free to contact the Yfwsrecinoe team, we will provide you with a Lifetime free after-sales service.

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Main Highlights

Upgraded Dual Sensors to Ensure Your Safety: Compared with most carbon monoxide smoke detectors on the market, our detector sensors have a lifespan of up to 10 years, while other detectors on the market only use three-years life sensors, so our products have a longer service life. The combined smoke and carbon monoxide detector uses a photoelectric smoke sensor and an electrochemical sensor to detect smoke and carbon monoxide faster and more accurately, protecting your home from two potentially deadly threats.
LCD Digital Displays & Multi-directional Sensing Hole: The informative LCD will show you the battery level and real-time CO levels in PPM (parts per million). If there is fire and carbon monoxide with a concentration over 0.1% db/m, the blue light flashes rapidly. If CO is detected, the red light will flash. Dense gas-sensing holes can prevent alarms from causing false alarms and reduce your worries.
Battery-Operated&Easy Installation:This CO alarm is powered by large capacity 3x1.5V AA batteries (included), and this combination smoke and carbon monoxide detector can be easily installed using the included mounting bracket, screws, and anchors. The detector's battery life is up to five years, and we also provide a lifetime free battery replacement service to save you money.
Test Mode Button and Loud Alarm: It allows you to easily know the working status of the smoke detector and carbon monoxide detector. You can press the test button to inspect the alarm weekly. Alarm Volume: Loud>85dB at 3 meters. The loud 85-decibel alarm is designed to be heard easily. When encountering a non-emergency situationfalse alarms occur), you can immediately press the test button and the LED light will flash 10 seconds, indicating that it has entered the silent mode.
Safety Guarantee and High Quality: This product has passed the UL standard report issued by the laboratory accredited by ILAC ISO 17025/NRTL standard. We have complete testing report of UL217 and UL2034. Protect yourself and your family from the silent danger of carbon monoxide with our top-of-the-line Carbon Monoxide Detectors. With its advanced detection capabilities, our Carbon Monoxide Detectors offer you an added layer of security and peace of mind. If you have any questions about Yfwsrecinoe smoke and carbon monoxide detectors, please feel free to contact the Yfwsrecinoe team, we will provide you with a Lifetime free after-sales service.

8.6

Very Good

First Alert

First Alert Combination Smoke & Carbon Monoxide Alarm, Interconnect Hardwire Detector with Battery Backup, SMICO100-AC, 1-Pack

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Main Highlights

First Alerts 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
Through early warning interconnect, when one alarm sounds, all compatible
Quick Connect Plug allows for easy installation with no need to rewire
Battery backup provides continuous protection during power outages
Test/silence button for efficient testing to ensure alarm is working properly

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Main Highlights

First Alerts 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
Through early warning interconnect, when one alarm sounds, all compatible
Quick Connect Plug allows for easy installation with no need to rewire
Battery backup provides continuous protection during power outages
Test/silence button for efficient testing to ensure alarm is working properly

8.3

Very Good

SHYEEH

SHYEEH Smoke and Carbon Monoxide Detectors, Combination Smoke Alarm and Carbon Monoxide Detector Battery Powered, CO Detector Alarm with Sensitive Sensor, Sound Warning and LCD Display, CDR-803

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Main Highlights

2-in-1 Detection: SHYEEH 2-in-1 smoke detector and carbon monoxide detector combo features a built-in sensitive photoelectric smoke sensor and an electrochemical CO sensor. This advanced combination enables the device to detect smoke and CO, two deadly gases, with greater accuracy. Smoke Detector promptly sounds an alarm to alert you, ensuring you stay out of the danger zone.
Alarm Criteria: Shyeeh smoke and carbon monoxide detector has a specific alarm threshold and can monitor within 215-323ft² to protect your home safety. When the carbon monoxide concentration is higher than 50ppm or the smoke concentration exceeds 1%/FT OBS (red LED flashes), the alarm will sound an 85 decibel alarm within three minutes.
Real-time data LCD display: The smoke and carbon monoxide alarm offers 24-hour real-time monitoring, enabling you to effortlessly check the concentrations of carbon monoxide and smoke in the surrounding environment. This feature helps protect your family from invisible threats. Additionally, when the battery is low, the LCD screen will display "Lb" to remind you to replace the battery.
Easy to Istall: You can mount carbon monoxide alarm on the wall or ceiling with screws (Include). Powered by 9V 6LR61/6F22 batteries (Not Included), no socket required, not affected by power outages, and can continuously monitor carbon monoxide and smoke levels to ensure your family's safety.
Home Protection:According to data analysed in the United States, a home fire occurs every 38 seconds. The earlier the danger is recognised, the risk of death is reduced by 50%. The carbon monoxide detectors monitor will protect your home from the dangers of CO and eliminate the need to pay high detection fees for suspected carbon monoxide leaks.

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Main Highlights

2-in-1 Detection: SHYEEH 2-in-1 smoke detector and carbon monoxide detector combo features a built-in sensitive photoelectric smoke sensor and an electrochemical CO sensor. This advanced combination enables the device to detect smoke and CO, two deadly gases, with greater accuracy. Smoke Detector promptly sounds an alarm to alert you, ensuring you stay out of the danger zone.
Alarm Criteria: Shyeeh smoke and carbon monoxide detector has a specific alarm threshold and can monitor within 215-323ft² to protect your home safety. When the carbon monoxide concentration is higher than 50ppm or the smoke concentration exceeds 1%/FT OBS (red LED flashes), the alarm will sound an 85 decibel alarm within three minutes.
Real-time data LCD display: The smoke and carbon monoxide alarm offers 24-hour real-time monitoring, enabling you to effortlessly check the concentrations of carbon monoxide and smoke in the surrounding environment. This feature helps protect your family from invisible threats. Additionally, when the battery is low, the LCD screen will display "Lb" to remind you to replace the battery.
Easy to Istall: You can mount carbon monoxide alarm on the wall or ceiling with screws (Include). Powered by 9V 6LR61/6F22 batteries (Not Included), no socket required, not affected by power outages, and can continuously monitor carbon monoxide and smoke levels to ensure your family's safety.
Home Protection:According to data analysed in the United States, a home fire occurs every 38 seconds. The earlier the danger is recognised, the risk of death is reduced by 50%. The carbon monoxide detectors monitor will protect your home from the dangers of CO and eliminate the need to pay high detection fees for suspected carbon monoxide leaks.

8.1

Very Good

KARUOTOP

Smoke Detector Carbon Monoxide Detector Combo 10 Year Battery, KARUOTOP Smoke Alarm CO Detector with Large Test/Silence Button, Adhesive or Screw Installation

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Main Highlights

Dependability & Precision: Advanced dual-sensor technology accurately detects both smoke and carbon monoxide. When danger is present, the 85 dB alarm delivers a loud, clear warning to protect your family.
10-Year Built-In Battery: Built-in lithium battery provides continuous 24/7 protection for up to 10 years. No more frequent battery replacements or power interruptionslong-lasting peace of mind.
Automatic Self-Check: The green LED flashes every 60 seconds to confirm the battery and sensor are working properly. The light is adjusted to a sleep-friendly level, ensuring reliable monitoring without disturbing rest.
Slim Design & Easy Operation: Ultra-thin profile blends seamlessly into any room. A large test/silence button can be activated with a stick, making it safer for seniors to check or mute the alarm without climbing a ladder.
Quick & Simple Installation: Mount on any wall or ceiling in minutes with the included screws or strong adhesive tape. No wiring, no professional help requiredjust easy, secure installation anywhere.

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Main Highlights

Dependability & Precision: Advanced dual-sensor technology accurately detects both smoke and carbon monoxide. When danger is present, the 85 dB alarm delivers a loud, clear warning to protect your family.
10-Year Built-In Battery: Built-in lithium battery provides continuous 24/7 protection for up to 10 years. No more frequent battery replacements or power interruptionslong-lasting peace of mind.
Automatic Self-Check: The green LED flashes every 60 seconds to confirm the battery and sensor are working properly. The light is adjusted to a sleep-friendly level, ensuring reliable monitoring without disturbing rest.
Slim Design & Easy Operation: Ultra-thin profile blends seamlessly into any room. A large test/silence button can be activated with a stick, making it safer for seniors to check or mute the alarm without climbing a ladder.
Quick & Simple Installation: Mount on any wall or ceiling in minutes with the included screws or strong adhesive tape. No wiring, no professional help requiredjust easy, secure installation anywhere.

8.1

Very Good

OLUNCLE

3 Packs Smoke and Carbon Monoxide Detector Powered by Battery,Portable Smoke Detector Carbon Monoxide Detector Combo with Large LCD Display, Fire Alarm Smoke Detector for Home,Kitchen

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Main Highlights

Dual Sensors ProtectionSmoke and carbon monoxide detector adpots photoelectric sensor and electrochemical CO sensor design. 2-in-1 sensitive alarm on this smoke detector carbon monoxide detector combo, providing a safer area for anyone.
Alarm and LED Indication Smoke and carbon monoxide detector has a real-time smoke and CO concentration on LCD display, once smoke or CO reaches its dangerous level, sensitive carbon monoxide alarm will give out both sound alert and red LED flash alarm, sound will be louder than 85 decibels.
Low Battery Warning A smoke and carbon monoxide detector is powered by 3 batteries, smoke alarm will chirp once every 30s to remind user of replacing a new battery. Make sure that this carbon monoxide detector always keeps its working status in daily life.
Easy to InstallThe installation of fire alarm smoke detector is easy, it is easy to mount on any wall or ceiling, suitable for bedroom, kitchen, living room, basement, hotel, office, etc. Test button is for battery and alarm operation verification.
Caution and Hints Smoke detector carbon monoxide detector combo adopts unique design. Do not use detergents or other solvents to clean the unit. Do not paint the unit. If you have any problems, please feel free to contact us.

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Main Highlights

Dual Sensors ProtectionSmoke and carbon monoxide detector adpots photoelectric sensor and electrochemical CO sensor design. 2-in-1 sensitive alarm on this smoke detector carbon monoxide detector combo, providing a safer area for anyone.
Alarm and LED Indication Smoke and carbon monoxide detector has a real-time smoke and CO concentration on LCD display, once smoke or CO reaches its dangerous level, sensitive carbon monoxide alarm will give out both sound alert and red LED flash alarm, sound will be louder than 85 decibels.
Low Battery Warning A smoke and carbon monoxide detector is powered by 3 batteries, smoke alarm will chirp once every 30s to remind user of replacing a new battery. Make sure that this carbon monoxide detector always keeps its working status in daily life.
Easy to InstallThe installation of fire alarm smoke detector is easy, it is easy to mount on any wall or ceiling, suitable for bedroom, kitchen, living room, basement, hotel, office, etc. Test button is for battery and alarm operation verification.
Caution and Hints Smoke detector carbon monoxide detector combo adopts unique design. Do not use detergents or other solvents to clean the unit. Do not paint the unit. If you have any problems, please feel free to contact us.

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