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- USA
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Ships within 48 hours · Estimated delivery Jul 6 - Jul 11
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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
4.3 ★★★★★
Based on 1092 reviews
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Product Reviews
★★★★★ 1
DONT WASTE YOUR MONEY!
Style: Original, Size: Standard/Queen
I ordered 4 pillows and paid almost $100 for them. They're absolutely pitiful! I could have bought better pillows at Walmart. They're soft and thin. Not at all what I was expecting.
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Reviewed in the United States on April 26, 2026
★★★★★ 3
Not as expected. Disappointed.
Style: Original, Size: Standard/Queen
Foam price was very small. Mostly poly fill
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Reviewed in the United States on September 10, 2025
★★★★★ 5
One of my best pillows
Style: Original, Size: Standard/Queen
Soft and comfortable
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Reviewed in the United States on September 12, 2025
★★★★★ 5
Puffed out to be fluffiest pillows yet.
Style: Original, Size: Standard/Queen
When I received my two pillows I was concerned they wouldn't be as fluffy as advertised; they came rolled up and shoved in a small box. However, after some time sitting out they are even fluffier than imagined. Firmness is exactly what I wanted and even after my husband folds them, they bounce back to their previous shape.
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Reviewed in the United States on November 27, 2023
★★★★★ 4
They sleep okay.
Style: Original, Size: Standard/Queen
Wish pillows was more firm but they are okay. Just more firmer.
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Reviewed in the United States on August 10, 2025
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