USI 10 Year Sealed Battery Carbon Monoxide Smart Alarm - MC304SB
- 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.
This carbon monoxide detector 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 a carbon monoxide alarm inside every bedroom, outside every sleeping area and on all levels. The USI MC304SB Carbon Monoxide Smart Alarm comes with a 10-year limited warranty that covers the battery and alarm.
Battery-operated carbon monoxide (CO) detectors are essential life-saving devices that provide portable and flexible protection against the silent killer, carbon monoxide. Unlike smoke alarms that detect smoke from a fire, CO alarms are specifically designed to sense the presence of this odorless, colorless, and highly toxic gas produced by fuel-burning appliances. The primary advantage of a battery-operated CO alarm is its versatility and ease of use. It can be installed in any room, providing protection in bedrooms, living areas, or even RVs and cabins, without the need for an electrical outlet. This makes them a perfect solution for homes where wiring may be difficult or for families who want the flexibility to move the alarm as needed. With modern 10-year sealed battery detectors, these alarms offer a decade of maintenance-free peace of mind, ensuring your family is protected around the clock from this dangerous gas.
Advantages of a Battery Operated Carbon Monoxide Detector
- Easy, Wire-Free Installation: No electrical work or professional assistance is needed. You can simply mount the alarm on a wall or place it on a tabletop, making it a perfect DIY solution.
- Flexible Placement: Because they are not tied to a power outlet, battery-operated CO alarms can be placed in the most critical locations, such as inside or outside bedrooms where CO poisoning is most dangerous, or in a basement near a furnace.
- Continued Operation During Power Outages: Power outages can increase the risk of CO exposure from backup generators, gas appliances, or fireplaces. A battery-operated alarm continues to function normally during these critical events, providing uninterrupted protection.
- Portable and Versatile: The wire-free design makes these alarms ideal for travel. You can easily take them with you to hotels, vacation rentals, RVs, or cabins to ensure safety on the go.
Advantages of a 10 Year Battery Operated Carbon Monoxide Detector
- 10-Year, Maintenance-Free Operation: The key benefit is a decade of continuous protection without the need to ever change the batteries. This eliminates the risk of an alarm failing due to a neglected or dead battery.
- Eliminates Low-Battery Chirps: A constant source of frustration, the low-battery chirp is completely avoided with a 10-year sealed battery. The alarm will only sound an "end-of-life" warning after its 10-year lifespan is over.
- Tamper-Proof Design: Since the battery is sealed, it cannot be removed or tampered with. This ensures the alarm is always powered on and ready to detect CO, providing a higher level of safety and reliability.

- 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, conforms to UL 2034 & CSFM listed
- Packaging: Easy Open Box Packaging
- Product Dimensions (W x H x D) : 2.25 x 1.25 x 4.25 in.
If you are interested in ordering a large quantity of items you may qualify for volume pricing discounts. Volume Discount Pricing is a great way for customers to save big on large, bulk orders of most items available in our store. Please send a bulk order request to our friendly sales staff so they may create a quote and provide personal service for your order! You will receive a response within 1-2 business days and our office hours are Monday through Friday, 8am-5pm CST.
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10 Year Sealed Battery Carbon Monoxide Smart Alarm Reviews
Easy to set up and works immediately. I'll probably purchase more of these for the rest of my house.
Great price on this item! Also great that you can get them in a multi pack.
Excellent product and easy to install
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!
Not requiring external power is a big plus. That makes it easy to place it in an optimal location.
Love this Alarm. Small and easy to hang.
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.
Arrived promptly. Was looking for an alarm to use in new room. Easy to mount on wall. This unit should last 10 years.
Was happy to find this ten year device for table top so I can keep it right next to the bed.
Was happy to find this ten year device for table top so I can keep it right next to the bed.