Meets New Laws & Legislations - This alarm exceeds industry standards, and is listed to UL Standard UL 217 and is California State Fire Marshal approved.
The Universal Security Instruments MI3050SB 2-in-1 Smoke and Fire Smart Alarm provides 10 years of continuous protection against deadly threats in the home. New patented Universal Smoke Sensing Technology provides the benefits of both photoelectric and ionization alarms in one device to protect against fast flaming and slow smoldering fires. 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).
Perfect for replacing existing Universal Security Instruments Alarms, this unit features a large mounting base to cover imperfections in drywall and the option to replace retrofitting applications. 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 UL 217 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 MI3050SB 2-in-1 Smoke and Fire Smart Alarm comes with a 10-year limited warranty that covers both the battery and alarm.
Warranty: 10 Year Limited Warranty on both the battery and alarm
Alarm Battery: 10 Year Sealed Permanent Power Battery
USI Bedroom 2-in-1 Smoke and Fire Alarm, 10 Year Sealed Battery (MI3050SB) Video
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USI Bedroom 2-in-1 Smoke and Fire Alarm, 10 Year Sealed Battery (MI3050SB) Reviews
Reviewed: 09/28/2021 by David W
It was difficult finding a 2-in-1 smoke and fire alarm in the stores where I live to replace my 10 year old unit. So I decided to go on line to search but the reviews of the few I found were poor. And then I found UI. The reviews on this detector were outstanding. I was a little leery because of the low price compared to the competition, but I thought I would take a chance. The unit shipped and arrived just days after ordering it. It was very easy to install and looks nice on the wall. I hope I never have to give a review of its effectiveness in a fire. I will order the hard-wire version in a few years to preplace my other fire alarm. I am very satisfies with this unit.
Reviewed: 09/09/2021 by Art S
Great product. Timely delivery.
Reviewed: 08/19/2021 by DONALD L
Great technology at a very good price.
so far, so good. Working as expected
Reviewed: 07/11/2021 by Anne L
Easy to install. No false alarms. Have more confidence in Universal's products than what I have experienced in the past with other brands that fail after a few months. Had positive reviews from customers.
Reviewed: 03/22/2021 by Robert H
Reviewed: 03/01/2021 by Robert Schafer
It is too early to give this product a 5 talk to me in 2030. But they seem to be what they advertised. They were easy to install and if they cut out the chirping in the middle of the night for the next 10 years, they will deserve a 10 rating.
Very good product
Reviewed: 11/08/2020 by John OBrien
I couldn't find a better deal on the internet than this for a 2 in 1 smoke/fire alarm with 10 year battery. I bought 4 and all are working fine.
Snap to Install
Reviewed: 09/29/2020 by Marc E
It took me less than 2 min per unit to install. Impressed with the quality and design. I am also looking forward to not having to find a chirping smoke detector in the middle of the night for the next 10 years!
Reviewed: 09/15/2020 by William Spicer
The alarm came very quickly. It was to replace the alarm in our used travel trailer we recently purchased. I was pleased to discover the unit has a 10 year battery. I didn't know something like that existed.
Smart Alarm Technology
Reviewed: 08/04/2020 by George Podolsky
Was glad to find an alarm that had both the Ionization and Photoelectric technology at a great price. Were easy to install. I recommend this alarm to anyone looking to replace or install a new.
Easy set up
Reviewed: 07/28/2020 by Michael Mustard
Once I received all three alarms it only took about two to three minutes per unit to install them on the wall. Very easy. I like the 10 year sealed battery.
Reviewed: 07/23/2020 by Stephen Mccarrick
Quick and easy
Reviewed: 07/10/2020 by Steven MacDonough
Installed new 10-year battery life unit in laundry room without 120V power. Ordered on website, delivery was very quick and installation easy.
Reviewed: 07/02/2020 by James Morehouse
The alarms in the house I purchased at the end 2018 had these alarms, and I noticed they were already three years out of date, and were still working. I decided to replace them with these from the same company, as they seem to be pretty reliable.
Reviewed: 06/29/2020 by Jill Sines
Excellent service, excellent product and shipped promptly.
Reviewed: 05/04/2020 by Silvia Maron
Excellent service. Order arrived quickly and in good condition
Reviewed: 04/22/2020 by Tracy Richardson
Very easy to replace my outdated alarms with these. Excellent product for a reasonable price and very fast shipping.
Reviewed: 12/13/2019 by Claudia Pines
Liked the 10 year sealed battery encased also purchased the carbon monoxide alarm in separate purchase. Set for 10 years.
Reviewed: 09/09/2019 by Melinda Crawley
They were easy to install, and offers both types of fire detection. Hope the sealed batteries last the 10 years. We just got ours. I put one in every room in the house.
Reviewed: 03/06/2019 by Samuel Brody
Shipped and delivered on time. Easy to install and works as it is supposed to
Installed 6 - no problems
Reviewed: 08/31/2018 by Brian Burns
Been installed for a couple weeks with no problems. Thanks for making the detectors fit the standard screw spread of an electrical box as my installed units replaced units that were part of a larger low voltage system. Other 10-year units come with bases that don't fit the screw spread of an electrical box.
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Reviewed: 07/20/2018 by John Freeman
Helpful, patient customer service phone calls. Shipment arrived earlier than promised. Light weight I had no concerns using the enclosed hollow wall anchors/screws on sheet rock ceilings. Thank you.
Reviewed: 05/12/2018 by Jen S.
I did a lot of investigation before I ordered new alarms. These had all of the options I wanted and they are so much cheaper than the other name brands. I installed them very easily myself and they have been great. Never had any false alarms. There are no annoying lights. I really like that they have different ones specifically for the hallway, bedrooms, and the kitchen. These have USST technology which is much better than the other brands. I highly recommend this brand.
Reviewed: 03/09/2018 by John Quingert
great replacement for the older 9v battery smoke alarms + more eco friendly than the older models delivered to the door quickly. Impressive
Reviewed: 03/07/2018 by G Michael Hannon
Excellent website, easy to navigate. Prompt customer service and almost lightning fast delivery.
Reviewed: 03/05/2018 by Rosemary Burke
Just what I was looking for with sealed 10 year battery.
Reviewed: 01/03/2018 by Richard Gorecki
Bought 4 of the units and am pleased how easy they were to install. Hoping that the batteries will actually last for 10 years.
10 year sealed smoke & fire alarm
Reviewed: 12/12/2017 by charles fairless
Decided to use Universal's dual sensor 10 year sealed battery smoke & fire detectors after 2 years of using single smoke detectors. Great products.
installed with no issues
Reviewed: 06/26/2017 by Leila Nicolle
Item was installed in master bedroom day after received with no issues and no problems with unnecessary beeps... hopefully will last the full 10 years with no problems...
Reviewed: 03/23/2017 by Eric Graves
Ordered the pack of 6. Easy to install and test. Looking forward to 10 years of no battery warning beeps!
Hobby/spare room sensor
Reviewed: 12/16/2016 by Ross Au
After supplying the bedrooms in our house, I added this detector in the Hobby/spare room. Impressed with the 10 year battery & both smoke sensing apparatus in one unit.
Reviewed: 10/27/2016 by Caterina A. Viscomi
Easy installation. Did the whole house in minutes.
Smoke & Fire Alarm
Reviewed: 05/28/2016 by Cheryl Eastman
We have bought these for both of our places FL & ME and the price is right and hopefully they will respond if we need them! Testing was done before installing.
Super easy to install
Reviewed: 05/23/2016 by Gary Mitchell
I am very impressed!
Reviewed: 04/29/2016 by Michael Zambrana
very easy to install
Seems good to me
Reviewed: 02/10/2016 by Gary Lee
This 2-in-1 alarm smoke, fire seems as advertised. I like that it has a universal sensor to detect both smoke and fire. I also like that it has a ten-year lifetime no battery changes required. I installed these in each of the bedrooms in my house.
Hard to Find Product
Reviewed: 01/12/2016 by Ron Rothberg
It's unusual to find a 2-in-1 fire/smoke detector at this price. Delivery was quick.
Reviewed: 12/28/2015 by Ron Rothberg
The website was easy to use and the ordering process worked fine. Shipment and delivery was very quick. These 2 in 1 detectors are at the best price point I've seen anywhere.
Very good alarm
Reviewed: 11/22/2015 by tony ghaemi
This unit with sealed 10-yr battery is a very good choice if you don't need inter-connectivity to other alarms.
Reviewed: 11/18/2015 by Art Dake Jr
Easy to install, no battery worries for 10 years. Nice and loud.