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First Alert CO400 Battery Operated CO Detector

  • Battery-operated for continuous CO monitoring.
  • Advanced electrochemical sensor for accurate detection.
  • Loud 85 decibel alarm alerts dangerous levels.
  • Easy installation, no wiring required.
  • 5-year limited warranty for peace of mind.
  • End of life signal chirp for replacement alert.
  • Trusted brand since 1958 for home safety.

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Best Alternatives and Similar Products for First Alert CO400 Battery Operated CO Detector

The best Carbon Monoxide Detectors includes Kidde Battery Powered Carbon Monoxide Detector, Kidde Plug-In Carbon Monoxide Detector, First Alert CO605 Plug-In CO Detector and many others as mentioned below.

1

Kidde Battery Powered Carbon Monoxide Detector

Best Product
  • Electrochemical sensor for accurate CO detection.
  • Easy installation without wiring required.
  • Operates on 2-AA batteries (included).
  • Portable design for travel and rentals.
  • Green LED shows power status clearly.
  • 85-decibel alarm alerts for CO presence.
  • Event Memory logs detection and testing history.
  • Price Range: $18.50
  • Size: ‎1 Pack

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    Alternatives

    2

    Kidde Plug-In Carbon Monoxide Detector

    Best Product
  • Plug-in design for easy installation and usage.
  • Includes 2 AA battery backup for outages.
  • 85-decibel alarm alerts for carbon monoxide detection.
  • Peak Level Memory tracks detection history.
  • Test-Hush Button for easy testing and silencing.
  • End of life chirp indicates replacement needed.
  • UL listed with 10-year limited warranty.
  • Price Range: $24.79
  • Size: ‎Pack of 1

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    Alternatives

    3

    First Alert CO605 Plug-In CO Detector

    Best Product
  • Easy plug-in design for any standard outlet.
  • Battery backup ensures continuous monitoring during outages.
  • Advanced electrochemical sensor for accurate detection.
  • Single test/silence button for user-friendly operation.
  • Loud 85-decibel alarm alerts of dangerous levels.
  • Low battery signal mute for 8 hours of quiet.
  • 7-year limited warranty for added peace of mind.
  • Price Range: $27.99
  • Size: ‎1-Pack
  • Material: Plastic

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    Alternatives

    4

    Hembisen 2-in-1 Gas & CO Detector

  • 2-in-1 gas and carbon monoxide detection.
  • Easy plug-and-play installation for convenience.
  • Digital display shows gas concentration levels.
  • 85 dB alarm alerts for immediate danger.
  • Power saving mode for energy efficiency.
  • Detects multiple gases like propane and methane.
  • Ideal for home, RVs, and workplaces.
  • Price Range: $27.19
  • Color: white
  • Material: ABS

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    5

    KOABBIT 4-in-1 Gas & CO Detector

  • 4-in-1 gas and CO detection capabilities.
  • Real-time temperature and humidity display.
  • Highly sensitive and accurate sensor technology.
  • 85dB alarm for immediate danger alerts.
  • Perfect for home, RV, and apartments.
  • Easy plug-in installation for convenience.
  • Comprehensive safety for your living space.
  • Price Range: $30.59
  • Size: ‎1 PACK
  • Material: ABS

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    6

    Kidde Battery-Powered Carbon Monoxide Detector

  • Battery-powered for easy, flexible installation.
  • Detects carbon monoxide using advanced electrochemical technology.
  • Includes 2-AA batteries for immediate use.
  • Green LED indicates unit is powered on.
  • 85-decibel alarm alerts you to CO presence.
  • Peak Level Memory logs previous CO detection.
  • Test-Hush button for easy testing and silencing.
  • Price Range: $27.94
  • Size: ‎KN-COPP-B-LPM

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    Alternatives

    7

    First Alert CO710 Carbon Monoxide Detector

  • 10-year battery for uninterrupted safety.
  • Digital display shows temperature and CO levels.
  • Loud 85-decibel alarm for dangerous CO levels.
  • Peak Level feature tracks highest CO concentration.
  • End-of-life signal chirp for timely replacement.
  • Meets rigorous UL testing standards.
  • Trusted brand since 1958 for home safety.
  • Price Range: $44.75

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    8

    Generic 3-in-1 Carbon Monoxide Detector

  • 3-in-1 functionality: CO, temperature, and humidity monitoring.
  • Sensitive electrochemical sensor for accurate detection.
  • 85dB alarm alerts for safety and awareness.
  • Easy plug-and-play installation for convenience.
  • Ideal for home, office, and travel use.
  • 90-day worry-free returns and exchanges available.
  • Compact design for portability and easy storage.
  • Price Range: $29.99
  • Material: ABS

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    9

    X-Sense Portable Carbon Monoxide Detector (XC0C-SR)

  • 10-year lifespan for long-lasting protection.
  • Powered by replaceable AA batteries for convenience.
  • Compact and portable for easy travel.
  • Versatile placement on desks or walls.
  • Simple buttons for urgent situations.
  • Clear display shows current CO levels.
  • Tri-color LED indicates alarm status easily.
  • Price Range: $13.39
  • Size: ‎1-Pack

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    10

    KOABBIT Gas & CO Detectors [2 Pack]

  • 2 Pack for home safety and convenience.
  • High sensitivity sensors for accurate detection.
  • LCD display shows gas concentration levels.
  • 85 dB alarm alerts for dangerous conditions.
  • 9V battery backup for power outages.
  • Detects multiple combustible gases and CO.
  • Power saving design with auto display off.
  • Price Range: $59.99
  • Color: white
  • Material: ABS

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    11

    WESHLGD Portable Carbon Monoxide Detector

  • 3-in-1 CO, temperature, and humidity monitoring.
  • High accuracy with imported electrochemical sensor.
  • Voice and visual alarms for safety alerts.
  • Plug-and-play design for easy use.
  • Portable and lightweight for travel convenience.
  • Big color LCD for easy readability.
  • Suitable for various indoor environments.
  • Price Range: $33.99

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    12

    PROTECTMETER Carbon Monoxide Detector Plug-In

  • Plug-in design for easy installation anywhere.
  • Digital LED display shows CO levels clearly.
  • 85-decibel alarm alerts dangerous CO levels.
  • Patented with UL1484, CE, RoHS certifications.
  • Portable and ideal for home, hotel, or RV.
  • 3-year timer ensures optimal device performance.
  • Lifetime warranty for peace of mind.
  • Price Range: $24.99
  • Size: ‎1Pack
  • Material: Plastic

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    13

    Hembisen 4-in-1 Gas & CO Detector (3 Packs)

  • 4-in-1 sensor for comprehensive safety monitoring.
  • Real-time gas and CO concentration display.
  • Easy plug-and-play installation for convenience.
  • 85dB alarm alerts for immediate danger.
  • Temperature and humidity monitoring for home comfort.
  • Upgraded round color screen for easy readability.
  • Ideal for homes, RVs, and various establishments.
  • Price Range: $79.53
  • Material: ABS

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    14

    KH Alert Carbon Monoxide Detector & Sensor

  • Monitors CO, temperature, and humidity levels.
  • Plug-and-play design for easy installation.
  • Uses advanced electrochemical sensor for accuracy.
  • Alerts with sound and light at dangerous levels.
  • Compact and portable for various locations.
  • Clear LCD display for easy readability.
  • 180-day worry-free return or exchange policy.
  • Price Range: $27.99
  • Material: ABS

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    15

    Hembisen [3 Pack] Carbon Monoxide Detectors

  • High-precision electrochemical sensor for accurate detection.
  • 85 dB alarm for immediate emergency response.
  • Rapid identification of carbon monoxide leaks.
  • Power-saving mode for energy efficiency.
  • Includes three detectors for comprehensive coverage.
  • Easy installation with included screws and manuals.
  • Reliable safety for home, office, and restaurant use.
  • Price Range: $38.69
  • Size: ‎3PACK

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