Customer Reviews For The USI Plug-In 2-in-1 CO and Natural Gas Smart Alarm with Battery Backup
frank b
June 9, 2022CO detector
Works great, easy to install, lasts for years.
Rhonda F
March 24, 2022Outstanding Customer Service
I had a Universal Security Carbon Monoxide and Natural Gas Alarm for 7 years when it reached the end of its lifespan. I purchased a new replacement and had difficulty getting it to work properly. I reached out to the customer service department who promptly sent a replacement. The new one works great! The company stands behind their products and treat the customer with respect.
Albin P
March 2, 2022Peace of mind
This plug in carbon monoxide, natural gas detector assures me peace of mind.
David L
February 27, 2022USI Plug-in Carbon Monoxide & Natural Gas Alarm
The product arrived exactly as ordered and on time. It was very easy to plug it in to the wall and testing it was also very easy. It was reasonably priced and adds allot of safety to my home.
Nathan T
October 3, 2021Installed easy, one of them defective
I purchased two 2 in 1 Carbon Monoxide and Natural Gas Smart Alarms. One of the CO/Gas detectors became defective after about three weeks, the CO sensor kept going off. There was clearly no CO in the area, and since I had two of the detectors, I swapped locations and the bad sensor still went off. I need a replacement for that one. Otherwise I was happy with the purchase and the ease of install.
Response:
Hello, Nahan. We're sorry to hear this. Please reach out to us here and we'll get this resolved for you.
Tammy R
April 19, 2021Best alarm out there
The dual alarm is the best out there!
Jimmy
April 12, 20212-in-1 CO and Natural Gas Smart Alarm with Battery Backup
I purchased the USI Plug-In, 2-in-1 CO and Natural Gas Smart Alarm with Battery Backup MCN400B for my son's new residence. I have a couple of them in my home. We both have natural gas appliances throughout heating, hot water, etc. and that always means the possibility of carbon monoxide if anything goes wrong. Or the possibility of a natural gas leak. Carbon monoxide CO is an odorless, colorless gas formed by incomplete combustion and displaces oxygen leading to poisoning and death. But with this Universal Security Instruments CO and Natural Gas Smart Alarm, I know that my family is protected from both of these dangers by this highly reputable and trustworthy company. That's why we have these and other Universal Security Instruments products. This CO and Natural Gas Smart Alarm is indeed an absolutely marvelous safety device and now that my son has his own residence, I want him to be afforded the same protection that the rest of my family has always had. This USI Plug-In, 2-in-1 CO and Natural Gas Smart Alarm with Battery Backup is the very best anywhere. I think of it like this : have you ever had water leak in your home? Most people have at one time of another. Well, you could just as easily have a natural gas leak or a carbon monoxide leak in your home. At least with a water leak, the worst thing that can happen is your house gets flooded. But with a natural gas leak or a carbon monoxide leak, you might die in your sleep. That's why when my family is sleeping, I want the USI Plug-In, 2-in-1 CO and Natural Gas Smart Alarm with Battery Backup to be watching out for us. While my family sleeps, this alarm is always on guard.
William Davitt
June 2, 2020Very satisfied
Works well and easy to use.
Jacob Eddy
January 6, 2020Carbon/gas detector
Works as advertised and shipped quickly
Porfirio De La Cerda
November 3, 2019Very good
Carol Wesley
September 24, 2019Two ways
I like that this device detects both CO and natural gas now that our home has changed from oil to gas heat. The back up battery is also a comfort.
Carol Wesley
September 24, 2019Two ways
I like that this device detects both CO and natural gas now that our home has changed from oil to gas heat. The back up battery is also a comfort.
Dave
August 23, 20192-in-1 Gas Alarm
- Very compact - Easy to order - Easy to install, just plug it in - Great price I have four units in my home and will return to Universal when I need replacements.
Kristin Pardue
May 2, 2018Quick and Easy
Quick and easy safety.
Sam Stierman
February 14, 2017Plug-In 2-in-1
Easy to install--pull the battery tab and plug it in.
Robert Norwillo
December 14, 20162 in 1 Alarm
A combination safety device which was a cinch to install and test. I simply trust that it does not alarm as it is designed to do. Thank you.
John Lelli
October 26, 2016Excellent
Excellent
- If the Alarm is exposed to 400 ppm of CO, it must alarm between 4 and 15 minutes.
- If the Alarm is exposed to 150 ppm of CO, it must alarm between 10 and 50 minutes.
- If the Alarm is exposed to 70 ppm of CO, it must alarm between 60 and 240 minutes.
The Universal Security Instruments Electric MCND400B Plug-In Carbon Monoxide and Natural Gas Smart Alarm provides dual protection against two deadly threats: carbon monoxide and natural gas. This innovative 2-in-1 device simplifies installation while safeguarding your home and family. The compact plug-in design conveniently fits into any standard outlet, requiring no professional installation. This makes the alarm ideal for homes, apartments, or mobile homes.
- Carbon Monoxide Detection: The 2-in-1 alarm utilizes microprocessor intelligence to analyze carbon monoxide readings and minimize false alarms. This ensures reliable detection while reducing unnecessary disruptions.
- Natural Gas Detection: The unit also operates as a natural gas detector, providing early warnings of potential hazards.
- End-of-Service Life Warning: This 2-in-1 carbon monoxide and natural gas detector provides an alert when it reaches the end of its lifespan (approximately 7 years from activation). A 9-volt alkaline battery (included) continues protection in the event of a power outage.
This USI Carbon Monoxide and Natural Gas Alarm is ETL Listed to UL Standard 2034 & UL1484, 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 Universal Security Instruments Electric MCN400 Plug-In Carbon Monoxide and Natural Gas Smart Alarm comes with a 5 year limited warranty.
Recommended replacement for the following obsolete models:
- CD-9590
