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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

Through early warning interconnect, when one alarm sounds, all compatible* alarms will sound

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

2-IN-1 DETECTION: Alerts you to both smoke & carbon monoxide (CO) using a single, cost-effective device.

NEVER-CHANGE 10-YEAR BATTERY: No low battery chirps or battery changes for 10 years & saves up to $40 over the life of the detector. (10-yr limited warranty on alarm, not a battery performance claim.)

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.

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.

EASY INSTALLATION: No wiring needed, simply mount the bracket onto the ceiling and twist & click the 5-inch smoke & CO alarm into the bracket.

TEST & HUSH BUTTON: Makes it easy to test the 5-inch combination detector and silence false alarms, should they occur.

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.

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 in an easy to install alarm

10-Year sealed battery eliminates battery replacements and low battery chirps for the life of the alarm

End-of-life warning lets you know when it’s time to replace the alarm

Slim profile design is half the depth of a standard alarm

【Dual Sensors Protection】Smoke 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 Install】The installation of fire alarm smoke detector is easy and wireless, 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.

【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 situation（false 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 certificates of UL217 and UL2034 testing. 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.

2-IN-1 PROTECTION: This smoke detector carbon monoxide detector combo utilizes dual sensors to detect both smoke and carbon monoxide. It alerts you to danger with an audible alarm that exceeds 85 dB.

BUILT-IN 10-YEAR BATTERY: This smoke and CO alarm comes with a sealed lithium battery offering 10 years of uninterrupted power. Its portability lets you switch off the alarm and bring it while traveling.

REAL-TIME LCD DISPLAY: The large LCD display provides a continuous clear view of CO levels, even when they're at 0. Its backlight ensures visibility in low-light situations, enabling effortless monitoring around the clock.

INTUITIVE LED: This smoke alarm and carbon monoxide detector features three colored ring LED lights for status updates: red for alarm, green for normal operation, and yellow for faults.

INSTALLATION IN SECONDS: Simple installation of this smoke and CO alarm on any wall or RV using the provided adhesive tape or screws. It's so straightforward that even those who avoid DIY projects will find it effortless.

2-IN-1 DETECTION: Alerts you to both smoke & carbon monoxide (CO) using a single, cost-effective device.

HARDWIRED & 10-YEAR BATTERY BACKUP: Operates on 120V AC wiring (installed in the ceiling). No battery changes for 10 years & saves up to $40 over the life of the 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.

INTERCONNECT CAPABILITY: When one alarm sounds, they all sound, so you can get out faster. (Different models offer different interconnection options and requirements. See User Guide for more info.)

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.

10-YEAR WARRANTY: Begins when alarm is powered on. If that date is unknown, it should be assumed that alarms should be replaced. (10-yr limited warranty on alarm, not a battery performance claim.)

Installation steps: Insert the plastic anchor into the hole and fix the battery cover to the ceiling/wall with screws. Push the smoke detector down until it merges with the battery cover and you hear a "click" sound, and the installation is complete.

2-in-1 Detection:SHYEEH 2-in-1 smoke detector carbon monoxide detector combo has built-in sensitive photoelectric smoke sensor and electrochemical CO sensor, which can detect smoke and CO, two deadly gases, more accurately and sound the alarm quickly.

Alarm Standard: 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 (red LED flashes) or the smoke concentration exceeds 0.1%db/m (blue LED flashes), the alarm will sound an 85 decibel alarm within three minutes.

Real-time data LCD display: The smoke & carbon monoxide alarms provides 24-hour real-time monitoring, allowing you to easily read the carbon monoxide and smoke concentrations in the surrounding environment, protecting your family from invisible threats. In addition, when the battery is low, the LCD screen will display "Lb" to remind you to replace the battery. (Requires 3 1.5V AA batteries)

Home Protection: According to professional data analysis in the United States, a home fire occurs every 38 seconds. The sooner you recognize the danger, the risk of death will be reduced by 50%. The SHYEEH smoke detector battery powered will remind you of the presence of CO and smoke and stay away as soon as possible. There is no need to pay high detection fees for suspected CO and smoke leaks.

Combo Smoke and Co Detector: Features electrochemical Carbon Monoxide sensing technology and photoelectric smoke sensor optimized to detect larger smoke particles produced by smoldering fires; helps minimize the number of false alarms

10 Year Battery Operated: This combination smoke detector and carbon monoxide detector alarm provides 10 years of continuous power with a built-in lithium battery; provides continuous monitoring of smoke and co levels, even if there's a power failure; an end-of-life signal will let you know when it's time to replace the unit for safety

Test/Sience ButtoTest/Sience Button: Tests the unit for proper operation and resets the carbon monoxide alarm, Alarmn: Tests the unit for proper operation and resets the carbon monoxide alarm, Alarm

LOW BATTERY SIGNAL: Low battery voltage signal and end of life warning ensures the co detector can work normal. Environment friendly, without smell, radiation or harm. It can keep you and your family safe at any time

A loud 85-decibel alarm sounds when Carbon Monoxide, and Smoke levels begin to rise, Easy to Install and Use: The alarm can easily install with mounting bracket. No hardwired anymore

2-in-1 Accurate, Reliable & Highly Sensitive Alarm: Equipped with both photoelectric smoke sensor and electrochemical CO sensor that work independently of each other; every second counts; detects both fast and slow-burning firesand instantly notifies you when dangerous smoke or Co concentration is detected while minimizing false alarms; provides the ultimate protection from 2 deadly threats,all contained in 1 unit

LCD Display: Cleary indicates real-time carbon monoxide (CO) concentration in the surrounding air, as well as the remaining battery life and working status of the alarm

Test and Silence Button: Tests the unit for proper operation and resets the smoke and carbon monoxide alarm,Alarm Volume:Loud>100dB(A)at 1 meters. Loud 100-decibel alarm is desiqned to be heard easily. Please kindly press if false alarm

Easy Install and Use: The alarm can easily install with mounting bracket No hardwired anymore. Very convenient to install at home or bedroom - wall mount, screws included

Low battery signal alarm: Low battery signal alarm and "end of life warning ensures the detectors can work normal Environment friendly,without smell,radiation or harm