USI Carbon Monoxide & Natural Gas Alarm, 120V AC Plug In
USI MCN400B
SKU USI-MCN400
Image may not depict product actual color, inclusions or accessories
USI Electrical Plug In Carbon Monoxide & Natural Gas Alarm features:
- This new compact plug in alarm is perfect for new or replacement installations.
- No Hardwiring Required.
- 120-Volt AC Plug-In.
- 9-Volt Battery Back-Up Included.
- It provides protection against two deadly household threats: Carbon monoxide and natural gas (methane).
- Its microprocessor intelligence is designed to eliminate nuisance alarms caused by non hazardous sources.
- 5 Year Warranty.
Similar Smoke Detector Products
USI MCN400B Description
USI Electrical Plug In Carbon Monoxide & Natural Gas Alarm features:
- This new compact plug in alarm is perfect for new or replacement installations.
- No Hardwiring Required.
- 120-Volt AC Plug-In.
- 9-Volt Battery Back-Up Included.
- It provides protection against two deadly household threats: Carbon monoxide and natural gas (methane).
- Its microprocessor intelligence is designed to eliminate nuisance alarms caused by non hazardous sources.
- 5 Year Warranty.
Similar Smoke Detector Products
Free Shipping Eligible
$46.54Each
Sold by the Case of 6 for only $279.24
In Stock-
Ships between 03/02/2026 - 03/16/2026
Return180-day Return Policy
Product Specifications
| Part Number | MCN400B |
| 10-Year Battery | No |
| Alarm Sensing Technology | Conventional |
| Alarm Sensor Type | Carbon Monoxide (CO), Natural Gas |
| Power Type | Battery, Plug-In |
| Sealed Battery | No |
| Warranty | 5 Yr |
| Weight | 0.46-lb |
| UPC | 042741204002 |
Important PROP 65 InformationWarning: This product can expose you to chemicals, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov. to CA residents.
Free Shipping Eligible
$46.54Each
Sold by the Case of 6 for only $279.24
In Stock-
Ships between 03/02/2026 - 03/16/2026
Return180-day Return Policy
Similar Smoke Detector Products
USI MCN400B Description
USI Electrical Plug In Carbon Monoxide & Natural Gas Alarm features:
- This new compact plug in alarm is perfect for new or replacement installations.
- No Hardwiring Required.
- 120-Volt AC Plug-In.
- 9-Volt Battery Back-Up Included.
- It provides protection against two deadly household threats: Carbon monoxide and natural gas (methane).
- Its microprocessor intelligence is designed to eliminate nuisance alarms caused by non hazardous sources.
- 5 Year Warranty.
Product Specifications
| Part Number | MCN400B |
| 10-Year Battery | No |
| Alarm Sensing Technology | Conventional |
| Alarm Sensor Type | Carbon Monoxide (CO), Natural Gas |
| Power Type | Battery, Plug-In |
| Sealed Battery | No |
| Warranty | 5 Yr |
| Weight | 0.46-lb |
| UPC | 042741204002 |
Important PROP 65 InformationWarning: This product can expose you to chemicals, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov. to CA residents.
Product Questions & Answers
Customer Reviews
Your voice matters. Be the first to leave a review and help other pros shop smarter
Need Assistance?