First Alert CO250B 4-Pack Carbon Monoxide Alarm (Battery Operated) White
Carbon monoxide alarm with electrochemical sensor and 85-decibel siren, designed to protect during power outages. Easy installation and reliable performance noted by customers
Highlights
- electrochemical CO detection
- effective in power outages
- tamper-resistant design
Pros
- electrochemical CO sensor
- 85-decibel siren for audible warning
- low battery indicator and test switch
- tamper-resistant locking pin & battery cover
- includes replacement battery guidance
Cons
- size noted as small by some customers
Best For
Features
- Electrochemical CO sensor detects elevated levels from fuel-burning appliances and blocked exhausts
- 85-decibel siren provides audible alert during CO threat, with power backup for outages
- Low battery indicator and test switch verify alarm function and monitor battery status
- Two silence settings: temporary alarm mute and low-battery chirp mute up to 8 hours
- Tamper-resistant locking pin and battery cover prevent removal or tampering
