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Home / Products / Carbon Monoxide Alarms

Universal Security Instruments Every Room Carbon Monoxide Smart Alarm with 10 Year Sealed Battery (MC304SB)

  • Universal Security Instruments Every Room Carbon Monoxide Smart Alarm with 10 Year Sealed Battery (MC304SB)
  • MC304SB
  • MC304SB
10 Year Sealed Battery | Smart Alarm
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Regular: $49.95
Price: $36.95
You Save: $13.00 (26% Off)
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Quantity
6 Pack
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Bundle Price: $210.60

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - 15 Customer Reviews
  • Features
  • Description
  • 10 Year Permanent Power
  • Manuals
  • Video
  • Bulk
  • Carbon Monoxide Smart Alarm provides 10 years of continuous protection against the silent killer - carbon monoxide.
  • Sealed battery (included) will never have to be replaced throughout the life of the alarm.
  • Features microprocessor intelligence to virtually eliminate nuisance alarms.
  • Mount this alarm on the wall or leave it standing up on a table top.
  • 10 year limited warranty on both the alarm and battery.
  • This alarm is suitable for installation in houses, apartments, dormitories, hotels/motels and manufactured housing.
  • Meets New Laws & Legislations - This alarm exceeds industry standards, and is listed to UL Standard UL2034 and is California State Fire Marshal approved.
The Universal Security Instruments MC304SB Carbon Monoxide Smart Alarm provides 10 years of continuous protection against the silent killer - carbon monoxide. Perfect for new or replacement installations, this maintenance-free alarm is suitable for houses, apartments and mobile homes. The sealed battery (included) will never have to be replaced throughout the life of the alarm, giving you a decade's worth in peace of mind even in the event of a power outage. Permanent Power also saves money from battery replacements (up to $38.00 over the 10-year life of the alarm), eliminates annoying low battery chirps and helps the environment by reducing environmental waste from disposed batteries. This alarm features microprocessor intelligence to assist in completely eliminating 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 10-years from activation). Mount this alarm on the wall or leave it standing up on a table top. The quick activation battery pull tab makes it easy to install while the deactivation key switches the alarm off and makes the batteries safe for disposal. Once the alarm is deactivated, the tamper resistant feature turns on to prevent deactivated alarms from being reinstalled.

This alarm conforms to UL2034 Standards. It has also been approved by the California State Fire Marshal and Federal Housing Authority (FHA) to exceed industry standards. For maximum protection, install an alarm inside every bedroom, outside every sleeping area and on all levels. The Universal Security Instruments MC304SB Carbon Monoxide Smart Alarm comes with a 10-year limited warranty that covers the battery and alarm.
Product Details
  • Warranty: 10 year limited warranty on both the alarm and battery
  • Alarm Battery: 10 Year Sealed Permanent Power Battery
  • Alarm Sensor Type: Electrochemical CO Sensor
  • Manufacturing Credits: ISO 9001 certified factory, UL listed & CSFM listed
  • Packaging: Easy Open Box Packaging
  • Product Dimensions (W x H x D): 2.25 x 1.25 x 4.25 in. 
Product Specs
UPC:
042741303040
MPN:
MC304SB
Category:
Carbon Monoxide Alarms
  • USI MC304SB Carbon Monoxide Alarm Manual
  • MC304SB CSFM Listing
  • MC304SB Spec Sheet
USI Carbon Monoxide Smart Alarm with 10 Year Sealed Battery (MC304SB) Video
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Customer Reviews

5

Average score based on 15 reviews

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5
Write A Customer Review Review
USI Carbon Monoxide Smart Alarm with 10 Year Sealed Battery (MC304SB) Reviews

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 11/29/2021 by L G Copeland

Good product.

Easy to set up and works immediately. I'll probably purchase more of these for the rest of my house.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 08/24/2021 by Mike P

Great price

Great price on this item! Also great that you can get them in a multi pack.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 06/01/2021 by Francisco R

Excellent product

Excellent product and easy to install

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 05/30/2021 by Steve K

Simple peace-of-mind

I purchased this for my laundry room which sits right below the gas furnace in the attic. It gives me some peace of mind to know that this will detect any CO leaks. Easy to setup and hassle-free due to the 10-year sealed battery. Pro-tip: wear earplugs when testing the alarm. It is LOUD!

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 11/27/2020 by Harry Swope

Monoxide Alarm

Not requiring external power is a big plus. That makes it easy to place it in an optimal location.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 10/28/2020 by Heidi Smith

Love this Alarm. Small and easy to hang.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 02/12/2020 by Bob Shoaf

Installed this product

The product came in a reasonable time. Easy to install. It hasn't alarmed yet, so that is a good thing, I think. I have another alarm and it hasn't gone off either, so I believe this new one is working as it should.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 11/12/2019 by Janice Rickstad

USI Carbon Monoxide Alarm

Arrived promptly. Was looking for an alarm to use in new room. Easy to mount on wall. This unit should last 10 years.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 09/24/2019 by Carol Wesley

Sleeping batter

Was happy to find this ten year device for table top so I can keep it right next to the bed.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 09/24/2019 by Carol Wesley

Sleeping batter

Was happy to find this ten year device for table top so I can keep it right next to the bed.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 05/15/2019 by Karen Gunter

Excellent customer service!

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 01/28/2019 by Karen Gunter

Product was exactly what I needed. Great customer service helped me pick the exact product.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 11/18/2018 by Bruce E. Stuck

Carbon Monoxide Detector

I purchase two MC304SB stand alone carbon monoxide detectors. Installation and testing was easy. Now I need to order 2 more that I shall tie into my security system. Great product, reasonable price, and good installation instructions.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 12/14/2016 by Sam Stierman

Easy to install.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 06/23/2016 by Steven Savoca

Met all my needs when it was most needed.

We purchased over 115 CO Alarms to meet a new mandate by New York State. The pricing and quality of the alarms, plus the excellent service provided by Universal Security Instruments made this a no-brainer. I highly recommend.

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