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Description
Plug-In 2-in-1 Carbon Monoxide and Natural Gas Smart Alarm with Battery BackupThe USI Electric MCN400 Plug In Carbon Monoxide and Natural Gas Smart Alarm is a 2 in 1 device that provides double the protection with a single installation. This dual sensing alarm protects against two deadly household threats: carbon monoxide and natural gas (or methane). Perfect for new or replacement installations, the 120 volt AC alarm is suitable for houses, apartments and mobile homes. The compact plug in design covers only (1) outlet for a
The USI Electric MCN400 Plug-In Carbon Monoxide and Natural Gas Smart Alarm is a 2-in-1 device that provides double the protection with a single installation. This dual-sensing alarm protects against two deadly household threats: carbon monoxide and natural gas (or methane). Perfect for new or replacement installations, the 120-volt AC alarm is suitable for houses, apartments and mobile homes. The compact plug-in design covers only (1) outlet for a fast and easy installation with no wiring required. This alarm features microprocessor intelligence to eliminate nuisance alarms, a single silence/test button to quiet a non-hazardous alarm and an end-of-service life warning that sounds when it's time to replace the battery (approximately 7 years from activation). Three LED colors display the status of the alarm, power, CO and gas in your home. The 9-volt alkaline battery (included) continues protection in the event of a power outage. This alarm is ETL Listed to UL2034 and UL1484 Standards, California State Fire Marshal approved and Federal Housing Authority (FHA) approved to exceed industry standards. For maximum protection, install an alarm inside every bedroom, outside every sleeping area and on all levels of the dwelling. The USI Electric MCN400 Plug-In Carbon Monoxide and Natural Gas Smart Alarm comes with a 5 year limited warranty. Universal Security Instruments is a U.S. based manufacturer of high quality, easy-to-install home safety products. Founded in 1969, Universal Security Instruments has nearly 50 years of heritage in providing home safety products for families. With state-of-the-art manufacturing facilities, Universal Security Instruments continues to launch revolutionary new products and technologies with the mission of always working to keep families protected.
- 2-in-1 alarm that provides double the protection with a single installation to protect against carbon monoxide and natural gas
- 120-volt AC alarm with backup battery is suitable for houses, apartments and mobile homes
- Three LED colors display the status of the alarm, power, CO and gas in your home
- Compact plug-in design covers only (1) outlet for a fast and easy installation with no wiring required
- Comes with a 5 year limited warranty
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.0 ★★★★★
Based on 9 reviews
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Product Reviews
★★★★★ 4
Good Pillows to Show Off Decorative Pillow Shams
Size: Queen - 20"*30" (pack of 2), Color: Grey
Although we have queen-sized beds, we typically use standard-sized pillows. One of the quilt sets I got this Christmas time came with queen sized pillow shams, and the standard pillows just didn't fill them properly. I could have sewn flanges on either side of the shams, but I decided to order these pillows instead. The are almost wide enough to fully fill those shams that started all this additional purchasing. (I also ended up ordering pillow protectors for the queen sized pillows.)
The pillows are fluffy and substantial for now. My husband manages to flatten out pillows almost no matter how they start our. For now, so far so good. They re a medium-weight and fullness, I would say. They do a good job of showing off the pillow sham design, so that's a plus. I'm not planning for us to sleep on them, but they are added back support while watching TV. They are primarily for decorative purposes when the bed is made with the quilt and shams. They were a reasonable value for the intended purpose.
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Reviewed in the United States on January 5, 2026
★★★★★ 5
Nice Pillows
Size: Queen - 20"*30" (pack of 2), Color: Grey
These pillows are comfortable, good firm support, material seems to be good. Let fluff up for 24 hours and they were ready for use. So far the don't go flat...
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Reviewed in the United States on May 8, 2026
★★★★★ 5
Good sleep
Size: King - 20"*34" (pack of 2), Color: Grey
Soft, but firm,good sleeping pillows
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Reviewed in the United States on June 6, 2026
★★★★★ 5
Good find for the money
Size: King - 20"*34" (pack of 2), Color: Grey
These pillows puffed right up and they are soft and comfy to sleep on. Good find for the money
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Reviewed in the United States on June 5, 2026
★★★★★ 5
Excellent pillows
Size: Queen - 20"*30" (pack of 2), Color: Grey
Very nice pillows seem well made perfect size after a couple of days the filling is absolutely perfect provides plenty of support
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Reviewed in the United States on May 31, 2026