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The USI Electric MI106 Hardwired Ionization Smoke and Fire Alarm with Battery Backup responds quickly to fast-flaming fires to protect your family against deadly threats in the home. Offering time-saving installation features and quality home protection at a great value, this alarm comes with a pre-installed 9 volt replaceable super heavy duty battery backup so it's always ready to protect you—even in the event of a power outage. The mounting bracket and quick connect wiring harness with pre-stripped, 8-inch pigtail wires makes installation a breeze, and the alarm is interconnectable with all USI and Universal brand alarms. Also, the patented Quick Find alarm origination technology easily identifies the first alarm to sound in the interconnected system, giving you vital information. This comes with a ten-year limited warranty.
From the Manufacturer
Founded in 1969, Universal Security Instruments has over 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 innovative technologies with the mission of always working to keep families protected.
KMaginn
2025-09-03 11:32:42
Ordered these to replace original detectors in house. Easy to install, interconnected and happy I don't have to worry about batteries beeping when they wear out!! So worth it!!
AWG
2025-08-30 16:32:27
We ordered this smoke detector a month ago and installed it with no problems. Tonight it has started chirping constantly and will NOT STOP even after I have changed the battery and pressed the reset button. I have read the entire owners manual and cannot find out why it is chirping once every 30 seconds. It is making me crazy! There is no reason why it should be chirping. We have only had it for one month!
johnwd
2025-08-02 16:52:55
As our smoke alarms time out (they should be replaced at least every ten years) we have been buying the same brand and this model so that we don't have any compatibility issues. Our house has a lot of smoke and CO detectors, and I'm thankful to the builder for that, and if one goes off it triggers the rest to sound as well. The new USI ones have a 'locate' function that will tell you which detector initiated the alarm if you have one that is too sensitive or otherwise giving false alarms. We don't have that issue, but I will appreciate it if we ever do.
Skeptic
2025-08-01 14:45:58
I am not an electrician but this was easy to install.I have four smoke detectors in my house, and recently a second one started beeping a few times signalling that it has reached the end of its life cycle.The previous one I replaced with the same brand and have had no issues with it.Apparently these things last about 10 years, so I maybe should have replaced all four at the same time, but the others seem to be going strong so far, so we'll see.
La Gata Blanca
2025-04-17 20:20:14
This was an exact replacement for our ceiling mounted smoke alarm. Easy install.
Deano
2025-03-01 13:56:14
Sold as 10 year battery hardwired product. Manufactured over 6 years ago leaving little or no remaining battery life. Others have commented similarly. Very deceptive and disappointing. Have hade issues with this product battery life even when newly manufactured.
Daniel R. Bynum
2025-01-30 12:47:59
This alarm super easy to install and works well
Arthur Eld
2024-12-09 17:22:23
I purchased this smoke alarm to replace my current wired alarm. It's supposed to be good for 10 years, however this one I just received expires in 2028. That's four years by my math. Why is this even being sold?
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