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Carbon monoxide co alarms four quick beeps, followed by five seconds of silence, followed by four quick beeps. Digital display and peak level button displays the peak CO level recorded by the alarm since it was last reset.
Ul certified, 5-year Limited Warranty. Displays CO concentration. Gas alarms one second of alarm on, one second of alarm off, repeating with “GAS” shown in display. Battery backup 9 volt battery included. Easy to install co and explosive gas alarm with three convenient mounting options including AC wall outlet, plugin six foot power cord, or table top.

No lab fees: your home could be susceptible to a radon problem, receive your first indication of radon levels within 24 hours and no lab fees, whether it's new or old, with or without a basement. Long term monitoring is necessary as radon levels fluctuate daily, to help you take more effective measures to prevent radon exceedance.
Radon tester is the only way to find out of you're in the risk. Wide application: radon gas detector is required in every family because there is no guarantee that radon levels in your home will be lower than 2pCi/L. You can't see, smell or taste radon, but you could still exposed to harmful levels in your home. Unlike a traditional radon test kit, ever! Save your costs. Easy to use: rechargeable battery powered, basement, making it easy to detect radon gas in your home, school, office, low consumption.


Ul certified, 10-year limited warranty. Purchase multiple alarms for whole-home detection - place 1 carbon monoxide detector on each level of your home & outside each sleeping area to help protect against poisonous CO gas.

Simple to use, with a single test/silence button; A loud 85 decibel alarm sounds when Carbon Monoxide levels reach dangerous levels.

Fast results, reliable result within 1 hour, no lab fees: first reading in 10 minutes after plug & play setup, and app connectivity for easy monitoring & general consumer use.


Warranty and return service1 year warranty, if there is any technical problem with the product, please contact us and we will deal with it as soon as possible.
1. SafetySiren
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Leader in Home Radon Detection Since 1993. Made in The USA, SafetySiren Pro4 Series 4th Gen, USA Version pCi/L
#adSafetySiren #ad - Continuous monitoring both short & long term radon levels on an easy to read digital display. Peace of mind safetysiren pro4 performs a fail-safe self-test once every 24 hours. Audible alarm will alert you if radon levels are high.More information #ad
Leader in home radon gas detection safetysiren pro4 series is our 4th Generation of electronic radon monitors. 3 audible alarm modes to Choose from with a Visual Alarm for the Hearing Impaired. Engineered, designed and Manufactured in the USA. Back-light mode for easy viewing of the digital display.Brand | SafetySiren #ad |
Manufacturer | Family Safety Products, Inc. #ad |
Height | 1.5 Inches |
Length | 4.5 Inches |
Width | 3.5 Inches |
Part Number | P4SU1 |
Model | P4SU1 |
More information #ad
2. Airthings
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Airthings Corentium Home Radon Detector 223 Portable, USA Version, Lightweight, 3 AAA Battery Operated, pCi/L, Easy-to-Use
#adAirthings #ad - Monitor your home without the need for an outlet. Fast results: on-screen results show both long and short term readings, for a quick overview of your radon levels. Long term monitoring is necessary as radon levels fluctuate daily. Know if your improvements have worked by checking the short term, on-screen readings.More information #ad
First of its kind: the first battery-operated, digital radon detector. Radon report: generate a radon self-inspection report easily, whenever you need it. Be in control: take action if your radon levels are high. Long term monitoring: monitor for cancer-causing radon gas.Brand | Airthings #ad |
Manufacturer | Airthings #ad |
Height | 1 Inches |
Length | 4.7 Inches |
Weight | 0.22 Pounds |
Width | 2.7 Inches |
Part Number | 223 |
Model | 223 |
Warranty | Please contact Airthings directly or check the Airthings website for warranty information for this product. |
More information #ad
3. Kidde
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White, Kidde Nighthawk Carbon Monoxide Detector & Propane, AC-Plug-In with Battery Backup, & Explosive Gas Detector, Digital Display , Natural
#adKidde #ad - Loud pulsing alarm that will sound to alert you to a potential problem. Two alarms in one detects carbon monoxide and explosive gas. Low battery warning feature indicates when the battery needs replacement.Carbon monoxide co alarms four quick beeps, followed by five seconds of silence, followed by four quick beeps. Digital display and peak level button displays the peak CO level recorded by the alarm since it was last reset.
More information #ad
Three convenient mounting options. Kidde’s carbon monoxide alarms meet the requirements of Underwriters Laboratories UL, an independent facility that tests products for compliance with widely-accepted safety standards. Ul certified, 5-year Limited Warranty. Displays CO concentration. Gas alarms one second of alarm on, one second of alarm off, repeating with “GAS” shown in display. Battery backup 9 volt battery included. Easy to install co and explosive gas alarm with three convenient mounting options including AC wall outlet, plugin six foot power cord, or table top.
Brand | Kidde #ad |
Manufacturer | Kidde #ad |
Height | 11 Inches |
Length | 2 Inches |
Weight | 1 Pounds |
Width | 8 Inches |
Part Number | KI-21006677 |
Model | KN-COEG-3 |
Warranty | 5 Year Limited |
More information #ad
4. Funny Kitchen
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Home Radon Detector, Portable Radon Meter, Radon Test Kit, Long and Short Term Monitor, Rechargeable Battery-Powered
#adFunny Kitchen #ad - A full charge will last a long time use. Be in control: on-screen results show both long and short term readings, take action if your radon levels are high. Especially in your family of infants, the elderly, pregnant women or sensitive people. It can be easily detected from room to room, or anywhere else.No lab fees: your home could be susceptible to a radon problem, receive your first indication of radon levels within 24 hours and no lab fees, whether it's new or old, with or without a basement. Long term monitoring is necessary as radon levels fluctuate daily, to help you take more effective measures to prevent radon exceedance.
More information #ad
Know if your improvements have worked by checking the short term, on-screen readings. Long term monitoring: radon is the first cause of lung cancer after smoking. Radon tester is the only way to find out of you're in the risk. Wide application: radon gas detector is required in every family because there is no guarantee that radon levels in your home will be lower than 2pCi/L. You can't see, smell or taste radon, but you could still exposed to harmful levels in your home. Unlike a traditional radon test kit, ever! Save your costs. Easy to use: rechargeable battery powered, basement, making it easy to detect radon gas in your home, school, office, low consumption.
Brand | Funny Kitchen #ad |
Manufacturer | Funny Kitchen #ad |
Model | HRDM-02 |
More information #ad
5. Kidde
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Digital Display, AC-Plug-In with Battery Backup, Kidde Nighthawk Carbon Monoxide Detector
#adKidde #ad - Electrochemical sensing technology - CO alarm detects the presence of carbon monoxide gas, 85 decibel alarm & memory storage. Ul certified, 10-year limited warranty. Peace of mind - when co detection is normal, a red dot appears in the lower right corner & blinks; includes a test button.More information #ad
Protects during a power failure - carbon monoxide alarm contains a 9V battery backup in case of plug-in failure. Easy installation - plug can be installed in any outlet of your home; or use the attached extension cord to place on a table or shelf.Brand | Kidde #ad |
Manufacturer | Kidde #ad |
Height | 1.75 Inches |
Length | 6.06 Inches |
Weight | 3 Pounds |
Width | 3.75 Inches |
Part Number | 900-0076 |
Model | KN-COPP-3 |
Warranty | 10 Year Limited |
More information #ad
6. Kidde
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Kidde Carbon Monoxide Detector, CO Alarm with Replacement Alert, AC Plug-In with Battery Backup
#adKidde #ad - Easy & quick installation - plugs into any standard AC wall outlet. Kidde is the #1 most installed fire safety brand in North America* - and a trusted leader in fire safety for more than 100 years.Ul certified, 10-year limited warranty. Purchase multiple alarms for whole-home detection - place 1 carbon monoxide detector on each level of your home & outside each sleeping area to help protect against poisonous CO gas.
More information #ad
Plug-in that still works during a power failure - 2-AA batteries included provide backup for your CO alarm in the event of a power outage. Co detector alerts with a loud 85dB warning signal indicating dangerous levels of carbon monoxide in your home.Brand | Kidde #ad |
Manufacturer | Kidde #ad |
Height | 4.5 Inches |
Length | 2.75 Inches |
Weight | 0.04 Pounds |
Width | 1.5 Inches |
Part Number | 900-0263 |
Model | KN-COB-DP2 |
More information #ad
7. FIRST ALERT
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3-Pack, FIRST ALERT Plug-In Carbon Monoxide Detector with Battery Backup, CO605
#adFIRST ALERT #ad - All first alert co alarms are rigorously tested to meet UL standards. Keep your family safe from carbon monoxide in multiple rooms with this convenient plug in carbon monoxide alarm 3 pack; The alarms work with any standard outlet and also have a battery backup for continuous monitoring of CO levels, even if there's a power failure.Simple to use, with a single test/silence button; A loud 85 decibel alarm sounds when Carbon Monoxide levels reach dangerous levels.
More information #ad
To ensure complete protection make sure to place 1 on each level of your home and in each bedroom. 7 year limited warranty; equipped with end of life signal chirp, so you know when it’s time to replace the unit for safety. Features an advanced electrochemical carbon monoxide sensor that accurately detects carbon monoxide levels, no matter where the detector is placed in the room.Brand | FIRST ALERT #ad |
Manufacturer | First Alert / BRK Brands, Inc. #ad |
Height | 9 Inches |
Length | 6.75 Inches |
Weight | 1.9 Pounds |
Width | 6.9 Inches |
Part Number | CO605 |
Model | CO605 |
Warranty | 7 Year Limited |
More information #ad
8. Ecosense
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Ecosense RD200 RadonEye, Bluetooth, Home Radon Detector, Easy Setup with Free App, OLED Display, Fast & Accurate Real-Time Monitoring
#adEcosense #ad - Accurate radon report: reliable, offices, fast, & accurate radon tester for homes, and buildings; Counting 30 times of radon level per hour 30 cph/pCi/L with true accuracy. What you get: radoneye, user guide, Free App, power cable, Customer support via email & 12 months limited warranty.Fast results, reliable result within 1 hour, no lab fees: first reading in 10 minutes after plug & play setup, and app connectivity for easy monitoring & general consumer use.
More information #ad
Easily stay alert: alarm when radon readings exceed EPA recommended action level of 4pCi/L; Just plug in and use whenever and wherever needed. Real-time continuous & long-term monitoring: radon reading results updated every 10 minutes ; Stores 1-year of data for long term analysis ; Long term radon testing matters as radon levels can fluctuate day and night, season to season due to environmental reasons.Brand | Ecosense #ad |
Manufacturer | Radon FTLab #ad |
Height | 4.72 Inches |
Length | 3.94 Inches |
Weight | 0.53 Pounds |
Width | 3.15 Inches |
Part Number | RD200 |
Model | RD200 |
Warranty | Manufacturer. |
More information #ad
9. Kidde
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Kidde Battery Operated Carbon Monoxide Alarm with Digital Display
#adKidde #ad - Ul certified, 10-year limited warranty. Electrochemical sensing technology - CO alarm detects the presence of carbon monoxide gas, 85 decibel alarm. Easy to read digital display - allows for easy viewing of carbon monoxide levels.More information #ad
Co detector with alert modes & 2 LED lights that pulse for power & CO detection. Protects during a power failure - CO detector operates on 3-AA batteries.Brand | Kidde #ad |
Manufacturer | Kidde Safety #ad |
Height | 2.75 Inches |
Length | 4.5 Inches |
Weight | 1 Pounds |
Width | 1.5 Inches |
Part Number | 21008873 |
Model | KN-COPP-B-LPM |
Warranty | 10 Year Limited |
More information #ad
10. KOABBIT
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Plug-in Carbon Monoxide Detector and Natural Gas Detector Alarm by Koabbit,Combination 2-in-1 Co Detector and Combustible Gas Detector,Propane,LPG,Gas Leak Detector for Kitchen/Home,UL2034 2 Pack
#adKOABBIT #ad - Safety certificationUL2034 and UL1484. Combustible gas detection rangelpGMethane, artificial gas, coal gas, liquefied petroleum gas, gas fuel, natural gas, liquefied natural gas etc. Power supply ac90-240v or 9v rechargeable battery; in the event of a power outage, the 9V rechargeable backup battery will automatically kick in to continuously protect your home.Warranty and return service1 year warranty, if there is any technical problem with the product, please contact us and we will deal with it as soon as possible.
More information #ad
2-in-1 combustible gas detector and carbon monoxide alarmthis 2-in-1 gas detector contains a catalytic combustion sensor and an electrochemical sensor for sensitive sensing and high accuracy, making it one of the most important members of your protection home!!! Lcd display & 85 high volume alarmwhen the combustible gas or carbon monoxide gas reaches a certain level, the gas detector will display the gas concentration value and sound an alarm, allowing you to quickly determine and make the right choice.Brand | KOABBIT #ad |
Manufacturer | Shenzhen Jikaida Technology Co., Ltd. #ad |
Height | 1.6 Inches |
Length | 4.3 Inches |
Weight | 0.33 Pounds |
Width | 2.9 Inches |
Part Number | QP111 |
Model | QP111 |
More information #ad