Universal Security Instruments AMIB3051SC

The alarm seems top be good. here's my problem. The unit was manufactured in September 2014, and I received it in October 15. I called the manufacturer, who indicated that the warranty period STARTED on the basis of the manufacture date. So - while I have confidence that the unit is good, loosing al...

The unit I just received is over 3-1/2 years into its advertised 7-year warranty period already; I guess they have a bunch of old ones just sitting around. Returned

I bought these units to replace the old (Expired) units in my home. NOTE that all smoke detectors have a manufacturing date and do eventually require replacement. These units are made by the same manufacturer (USI) as the original units installed by my home builder, so the wiring harness (connection...

I've had this MDSCN111 for one year now and there are no false alarms, and the original battery still works. Unlike the Nest Protect, this unit detects natural gas. It's also half the price of the Nest. I give it 4 stars because its hard to read the names on the display to tell which light is lit. B...

I have purchased 3 of these now to replace my old USI smoke detectors. One of them was faulty and after about 6 months started giving false carbon monoxide alarms that would not go away. The first time happened in the middle of the night and my 2 and 3 y/o children woke up crying and we evacuated to...

ok.. I did manage to get it installed without any issues (got the wired version) BUT... it seems to go off constantly! I had a different detector in the same location as before but just not a CO & gas detector. this one goes off way more that the other one. It is located down a hallway from my kitch...

We had somewhat wonky smoke detectors in our home, and some of them were approaching the end of their usable life anyway, so I decided to replace them all at once. We ended up ordering a dozen MDSCN11 units; one of them was dead on arrival, and two more died within the first month (started complaini...

This was a replacement unit for a defective unit that was purchased about six weeks earlier. I purchased several of these items in the prior purchase and am very happy. I just had one that was defective. This is a very nice universal smoke detector. I'm not real happy with my attempts to return the ...

Decent detectors but seem to have out of box or short life span issues. At the higher end of the price scale I would expect better life and initial performance.

I received this unit and it only has 6 years before the listed expiration. It's supposed to have 7 years. Other than that it works fine.