- Basic battery powered – easy batter replacements
- Simple single test and silence button
- End of life timer will let you know when it’s time to replace
- Low battery warning and silence
- Tested to the highest industry standards for safety
$32.00 Original price was: $32.00.$22.40Current price is: $22.40.
- Experience the Best Quality
- Your happiness, our mission.
- Shop with Peace of Mind
- Quality You Can Trust

The First Alert® battery-operated carbon monoxide detector utilizes an electrochemical sensor that alerts you at the first signs of increased CO levels in your home. The unit features easy access to the (2) AA batteries included. The alarm is also equipped with a single mute button for false alarms, a test alarm function and an end-of-life signal. This product is backed by a 7-year limited warranty.
| App Compatibility | No |
|---|---|
| Peak Level History | No |
| Works with Apple HomeKit | No |
| Width(mm) | 160.274 |
| Width(in) | 6.31 |
| Width(cm) | 16.0274 |
| Wi-Fi Compatibility | No |
| Warranty | 7-year |
| Voltage(Volts) | 120 |
| Voice Alert | No |
| Series Name | CO400A |
| Safety Listing | CSA safety listing |
| Propane Detector | No |
| Power Source | Battery-operated |
| Package Quantity | 1 |
| Battery Back-Up | No |
| Package Contents | Carbon monoxide alarm, batteries |
| Methane Detector | No |
| Length(mm) | 58.166 |
| Length(in) | 2.29 |
| Length(cm) | 5.8166 |
| Hub Required | No |
| Height(mm) | 217.424 |
| Height(in) | 8.56 |
| Height(cm) | 21.7424 |
| File/Certification Number | CSA 6.19-01 |
| Display Type | Analog |
| Color/Finish Family | White |
| Bluetooth Compatibility | No |
| Works with iOS | No |
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