• Home
  • Products-
    • Sensing Plus® Smoke Alarms
    • Smoke & Fire Alarms
    • Carbon Monoxide Alarms
    • Combination Alarms
    • 10 Year Battery Alarms
    • Gas Detectors
    • Accessories
    • Bathroom Fans & Parts
    • Outlet Safety & Wiring Devices
  • Save 10% Today - See How!
  • Buying In Bulk
  • Community Outreach
  • Order Status
  • About Us
  • Customer Help+
    • Ordering Questions
    • Shipping
    • Order/Item Status
    • Returns
    • View All Topics
  • View Cart / Checkout
USI Store Logo
0
View Cart Checkout
Univerasl Security Store Logo

Free Shipping On Orders $59 & UP

Order Status

Help

  • Products
    • Smoke & Fire
      • Battery Smoke Alarms
      • Hardwired Smoke Alarms
      • Sensing® Plus (8th Edition)
      • 10 Year Battery Alarms
      • VIEW ALL
    • Carbon Monoxide
      • Battery CO Alarms
      • Hardwired CO Alarms
      • Plug-In CO Alarms
      • Combination Alarms
      • VIEW ALL
    • Other Safety
      • Gas Detectors
      • Accessories
      • Bathroom Fans & Parts
      • Outlet Safety & Wiring Devices
      • VIEW SALE

    New Sensing Plus® Multi Criteria Detection Alarms

    Include the latest in smoke and fire safety enhancement features while conforming to the new UL 217 8th Edition standards

    Sensing Plus Alarms
  • Categories
    • Smoke & Fire Alarms
    • Carbon Monoxide Alarms
    • Combination Alarms
    • 10 Year Sealed Alarms
    • Accessories
    • Bathroom Fans & Parts
    • Outlet Safety & Wiring Devices
    • Buying In Bulk
    • Product News
  • Cart
    0
Home / Products / Combination Alarms

USI Electric Hardwired 3-in-1 Smoke, Carbon Monoxide and Natural Gas Alarm (MICN109)

  • USI Electric Hardwired 3-in-1 Smoke, Carbon Monoxide and Natural Gas Alarm (MICN109)
3-in-1 | Battery Drawer | Silence
Availability: Sorry, this item has been DISCONTINUED.
In-Stock Notification Sign Up

To be notified when this item is back In Stock, please enter your Email Address below:

Regular: $59.95
Price: $44.95
You Save: $15.00 (25% Off)
free shipping online only
*On Orders Over $59
Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - 55 Customer Reviews
  • Features
  • Description
  • FAQs
  • Manuals
  • Video
  • Bulk
  • 3-in-1 Smoke, Carbon Monoxide and Natural Gas Alarm
  • Single Installation protects against Fires, CO and Natural Gas
  • 120 Volt AC Wired-In
  • 9 Volt Energizer Alkaline Battery Backup Included
  • Loud 85 db Alarm
  • Microprocessor Virtually Eliminates Nuisance Alarms
  • Product End of Service Life Warning
  • Test/Reset Button
  • Quick Draw Battery Drawer
  • 4 LED's Indicate: Power, Smoke, CO & Gas
  • Interconnectable with up to 24 Compatible Devices
  • Tamper Resistant Locking Feature
  • Battery Activation Pull Tab
  • Bracket Mounts to any Standard Wiring Junction Box
  • Replaces the now obsolete USI-7795 and CD-9795 Wired-In 120 Volt Combo Smoke & CO Alarm
  • Ideal for Homes, Apartments and Mobile Homes
  • Conforms to UL2034, UL217 and UL 1484 Standards
  • California State Fire Marshal Approved
  • 7 Year Limited Warranty
The USI Electric MICN109 Hardwired Ionization, Carbon Monoxide and Natural Gas Alarm is a 3-in-1 device that provides triple the protection with a single installation. This alarm protects against (3) deadly household threats: fast-flaming fires, carbon monoxide and natural gas (or methane). Perfect for new or replacement installations, the 120-volt AC/DC hardwired alarm is suitable for houses, apartments and mobile homes. Advanced smoke recognition gives the MICN109 a faster response time to smoldering fires when compared to conventional smoke alarms. Auto sensitivity calibration provides superior nuisance alarm protection and creates consistency in alarm sensitivity.

This alarm has additional automatic features including a self-diagnostics check and a sensitivity adjustment for changes in temperature or humidity. The 9-volt alkaline battery (included) continues protection in the event of a power outage. This alarm features a front-loading battery drawer for replacement without removing the alarm from the bracket. Mount the bracket to any standard wiring junction box and use the large mounting base to cover imperfections in drywall. The plastic dust cover protects the alarm and (2) tamper-resistant locks prevent unwanted alarm or battery removal. For maximum protection, install an alarm inside every bedroom, outside every sleeping area and on all levels of the dwelling. The USI Electric MICN109 Hardwired Ionization, Carbon Monoxide and Natural Gas Alarm comes with a 7 year limited warranty.

This USI Alarm replaces the now obsolete USI-7795 and CD-9795 Wired-In 120 Volt Combo Smoke & CO Alarm (this model also utilizes the same mounting bracket and wiring.)
Product Details
  • MPN: MICN109
  • UPC: 042741001090
  • Warranty: 7 year Limited Warranty
  • Alarm Power Source: 120 volt hardwired & 9 volt battery backup
  • Alarm Sensor Type: Ionization Smoke Sensing & Metal Oxide Carbon Monoxide Sensor
  • Manufacturing Credits: ISO 9001 certified factory, UL listed & CSFM listed
Product Specs
UPC:
042741001090
MPN:
MICN109
Category:
Combination Alarms
Q: WHY DOES MY SMOKE ALARM 'CHIRP' APPROXIMATELY ONCE EVERY MINUTE?
A: The smoke alarm chirps to indicate a "low battery" condition, meaning the battery needs to be replaced. Battery powered smoke alarms will chirp a minimum of 30 days before the battery completely loses power.

AC powered smoke alarms with battery backup will chirp indefinitely assuming AC power is present; if battery power is low, or battery is removed; until a fresh battery is installed. Approved replacement batteries are listed on the back of each smoke alarm and in the user's manual.

Certain model smoke alarms with a silence button (designed to silence the alarm during a nuisance alarm) may chirp to indicate the smoke alarm is in the silence mode. The chirp will stop after approximately 8 minutes and the smoke alarm will return to its normal operation.

Q: WHAT LEVELS (PPM) OF CARBON MONOXIDE CAUSE AN ALARM?
A: Carbon monoxide alarms are designed to alarm before the average healthy adult feels symptoms. Since you cannot see or smell CO, never assume it's not present. Underwriters Laboratories Inc. Standard UL2034 requires residential CO alarms to sound when exposure times and exposure levels of CO in the chart below. CO alarm levels are measured in parts per million (ppm) of CO over time (in minutes). The UL2034 Required Alarm Points are:
  • 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.

Q: IS CARBON MONOXIDE HEAVIER THAN AIR?
A: Carbon monoxide is not heavier than air. A carbon monoxide alarm should be installed in a location where the alarm will stay clean, and out of the way of children or pets. Refer to the user's manual for specific installation requirements.

Q: WHAT DOES IT MEAN WHEN THE RED LIGHT ON THE ALARM FLASHES APPROXIMATELY ONCE EVERY MINUTE?
A: The flashing red light gives a visual indication that the smoke detector is functioning properly. It also indicates a working battery is connected to the smoke alarm.

Q: WHERE SHOULD I INSTALL MY CARBON MONOXIDE ALARMS?
A: It is very important to install a carbon monoxide alarm outside each separate sleeping area, and for maximum protection, install one in every bedroom. Many states now require installation of a carbon monoxide alarm inside each bedroom. For added protection, placement of an additional carbon monoxide alarm at least 15-20 feet away from the furnace or fuel burning heat sources is recommended. Install carbon monoxide alarms a minimum of 10 feet from sources of humidity like bathrooms and showers. In multiple-story dwellings, install one carbon monoxide alarm on every level. If you have a basement, install a carbon monoxide alarm at the top of the basement stairs, and in each separate sleeping area.

Q: WHAT AREAS SHOULD I AVOID INSTALLATION OF A CARBON MONOXIDE ALARM?
A: Do not install carbon monoxide alarms in garages, kitchens, furnace rooms, or in any extremely dusty, dirty, humid, or greasy areas. Do not install alarms in direct sunlight, or areas subjected to temperature extremes. These areas include unconditioned crawl spaces, unfinished attics, un-insulated or poorly insulated ceilings, and porches. Carbon monoxide alarms should not be installed in outlets covered by curtains, heavy furniture or other obstructions. Do not install in turbulent air-near ceiling fans, heat vents, air conditioners, fresh air returns, or open windows. Blowing air may prevent carbon monoxide from reaching the CO sensors.

Q: WHAT DOES THE CONTINUOUS GREEN LIGHT ON MY SMOKE ALARM INDICATE?
A: When a green light is present on your smoke detector, it means that AC power is currently operating the alarm.

Q: THE GREEN LIGHT ON MY SMOKE ALARM HAS GONE OUT, WHAT DOES THIS MEAN?
A: If the green light on your smoke detector is not on, it means the AC power has been interrupted to the alarm. Check the circuit breaker and AC wiring to make sure power is still reaching the smoke alarm.

Q: HOW CAN I TELL WHICH SMOKE ALARM IN A MULTI-STATION SYSTEM INITIATED THE ALARM?
A: When interconnected alarms are alarming, the smoke alarm which initiated the alarm, either by test button or sensing smoke, will flash the red LED light approximately once per second. The red LED light on the other non-initiated interconnected smoke detectors will not be lit but will sound the alarm.

Q: HOW MANY SMOKE ALARMS OR DEVICES CAN BE INTERCONNECT AT ONE TIME?
A: The NFPA 72 standard states the interconnect limit is 12 smoke alarms and up to 6 other alarms (heat alarms or carbon monoxide detectors) for a total of 18 total alarms. With 18 alarms interconnected, up to an additional 6 relay modules may be interconnected (for a maximum of 24 devices).

If battery backup alarms and non-battery backup alarms and accessories are mixed in an interconnect system, all devices without battery backup WILL NOT operate during an AC power failure.

CAUTION: USI alarms and accessories should only be interconnected with other USI alarms and accessories. Connecting devices from another manufacturer to USI devices may result in nuisance alarms, failure to alarm, or damage to one or all of the devices in the interconnect system. All interconnected USI alarms should be powered by the same fuse or circuit breaker. Smoke alarms shall not receive their power from a circuit that is protected by a ground fault circuit interrupter. Improper connection will result in damage to the alarm, failure to operate, or a shock hazard.

  • MICN109 USI Alarm Manual
  • MICN109 Alarm Spec Sheet
  • MICN109 CSFM Listing
USI Electric Hardwired 3-in-1 Smoke, CO and Natural Gas Alarm (MICN109) Video
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.
We make it as easy as possible to ensure you get the lowest prices available:
  • Let us know what products & the quantities you are interested in.
  • Get a detailed quote from a dedicated sales rep.
  • Our warehouse ships directly to you.
  • You enjoy the savings & are now a preferred customer.
Send A Request Now
Direct From Warehouse Pricing bulk purchase, wholesale pricing

Related Products

USI Electric Hardwired 2-in-1 CO and Natural Gas Alarm, Battery Backup (MCN108)
USI Electric Hardwired 2-in-1 CO and Natural Gas Alarm, Battery Backup (MCN108)
$44.05 Rating: 4.9/5Rating: 4.9/5Rating: 4.9/5Rating: 4.9/5Rating: 4.9/5 65
USI Digital Display Plug-In 2-in-1 CO and Natural Gas Smart Alarm (MCND401B)
USI Digital Display Plug-In 2-in-1 CO and Natural Gas Smart Alarm (MCND401B)
$50.35 Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 25
USI Electric Hardwired 2-in-1 Universal Smoke Sensing Smoke Alarm (MDS107)
USI Electric Hardwired 2-in-1 Universal Smoke Sensing Smoke Alarm (MDS107)
$22.00 Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 32
USI Plug-In 2-in-1 CO and Natural Gas Smart Alarm with Battery Backup (MCN400B)
USI Plug-In 2-in-1 CO and Natural Gas Smart Alarm with Battery Backup (MCN400B)
$41.95 Rating: 4.9/5Rating: 4.9/5Rating: 4.9/5Rating: 4.9/5Rating: 4.9/5 16
USI 4-in-1 Hardwired Smart Alarm with Smoke, Fire, CO and Gas Detection MDSCN111
USI 4-in-1 Hardwired Smart Alarm with Smoke, Fire, CO and Gas Detection MDSCN111
$52.45 Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 58

Customer Reviews

5

Average score based on 55 reviews

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5
Write A Customer Review Review
USI Electric Hardwired 3-in-1 Smoke, CO and Natural Gas Alarm (MICN109) Reviews

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 02/12/2018 by Edward Stout

Awesome company got my items needed in a expedient fashion!

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 02/02/2018 by Richard Gwizdala

Good product great service

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 01/17/2018 by James Rushing

Smoke Alarm

On time and works. All you can ask for.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 01/10/2018 by David McCrary

The customer service person that helped me was so kind as to help me find the replacement product that I needed and when I received it, it was correct and it already had batteries inserted. This is usually not the norm. Thank you for the great service on a simple order.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 01/09/2018 by Robert Peterson

Good deal

Replaced oem. Works well

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 12/13/2017 by Nancy Miller

Just What was Needed

Our old smoke alarm kept chirping, even after multiple fresh batteries. Ordered a replacement easy to install. No more birdies!

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 12/13/2017 by Betty Holland

They are very easy to install. We have a small home but it is very important to us. We have four regular fire alarms that are connected for safety. We appreciate your help and speedy shipping of these items.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 09/19/2017 by Courtney Sheffert

Easy to install

Was easy to install replacing our old unit that was no longer working.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 08/30/2017 by Emily Dickens

Happy

Happy it worked although it was a little difficult to get it to fit in.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 08/28/2017 by barbara smith

Exactly what we needed!

We had a smoke detector go bad, found this online, and got it delivered immediately, a perfect match!

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 06/16/2017 by ronnie taborn

USI Electric Hardwired 3-in-1 Smoke, Carbon Monoxide and Natural Gas Alarm

Great product

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 05/31/2017 by Don Rahaim

Quick turn around

My multi-sensor device had failed. I went online and ordered the replacement and received it within a week. The device replacement was easy and a great deal more economical than what my security monitoring service quoted me. Great product and even greater service.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 05/15/2017 by Carl

Excellent product

Replaced two smoke detectors with these units to make our home CA compliant for CO and CO2 detection . Items were shipped quickly and function perfectly.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 04/03/2017 by Leslie Blake

Delivered in a timely manner and was easy to install.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 02/12/2017 by Achenkunju Chandy

Very good. I am happy

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 01/14/2017 by Helmuth Ludwig

works as expected

Product arrived as promised and works as expected

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 01/12/2017 by Elizabeth Haydon

smoke detecter

Super product and fast shipping and delivery.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 01/02/2017 by abrahams

Good service and product

Perfect match to the old model that I replaced. The service is excellent.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 12/02/2016 by Linda SCOVILLE

easy to install-working well so far

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 11/07/2016 by Ilaina Edison

3-In-1 alarm

Excellent product, easy to install and reasonably priced.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 10/14/2016 by James Capelle

Fast installation, spent more time dealing with the ladder

This was a replacement for a very old model that lasted over 10 years. Just had to change out the mounting plate and the wiring connection matched the older model and this was installed in 15 minutes. Add another 6 minutes to installation, I had to go get and later return the ladder.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 09/29/2016 by Walfred Pelto

very good

I have ordered and used these 3 in one smoke, carbon monoxide and natural gas detectors for several months now. They have replaced the need for 2 other detectors. Plus added protection with detecting natural gas. It's a win win. Thank you they are easy to mount you just plug them into your old smoke detector and you are finished.

Rating: 4/5Rating: 4/5Rating: 4/5Rating: 4/5Rating: 4/5 - Reviewed: 09/13/2016 by John Komer

Hoping this new model will work longer than the previous model. So far so good.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 08/10/2016 by Raymond Allen

The unit came and was able to replace the one that went bad.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 07/17/2016 by Robert Fritz

speedy delivery

the product was ordered one day and arrived the very next day. Easy replacement for earlier models which had stopped working. My concern was the earlier models had a life of 5 - 7 years and they stopped working before the fourth year was over. I will call to discuss.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 07/16/2016 by Raymond Quesnel

Items arrived quickly, were extremely easy for me a veritable disaster as a handyman to install actually replace so no need for wiring. My experience is such I would have no problem recommending this company!

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 07/07/2016 by Tracy Bishop

This model is a replacement for a previous model. The base that attaches to the ceiling is the same and was easy to pop the new detector in place.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 07/05/2016 by Roger Rigby

Excellent product

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 07/04/2016 by rebecca wright

Review

Very good

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 06/22/2016 by CHARLES WALKER

thank you for your help and keeping up what you say

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 06/22/2016 by Michael Marler

Works great so far with no false warnings. Easy to install.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 06/07/2016 by Sharleen Bailey

Perfect replacement

We needed a replacement for an older model and this was the recommended model. Fit the brackets perfectly, no need to have to replace everything, which was great for me!

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 05/19/2016 by Robert Peterson

Great product

This is the second one I have purchased. Product works great. Great value!

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 04/27/2016 by jonathan  estabillo

A+++

VERY FAST SHIPPING. I ORDERED 2 AND LIKE IT VERY MUCH.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 04/15/2016 by Glen Teason

Right product for right application

We've used USI 3 in 1 alarms in our home for many years now. They actually came with our new home. They have never let us down and never fail to alarm if there is a valid reason to do so. We trust them and will keep buying them.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 04/12/2016 by Glen Teason

Right product for right application

We replaced our aging, older smoke and fire alarms with this new one, to ensure we had the latest technology and safety. Works perfect in our home system. Fully compatible.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 04/07/2016 by Shirley Deleon

Excellent

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 03/30/2016 by jonathan  estabillo

Love it

working good and properly. Buying another one after this review.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 03/28/2016 by Fahad Anees

great product and service

Arrived on time and great service by them

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 03/15/2016 by Madison Galbraith

My order came quickly and it works perfectly and it replaced my old one easily. Thanks

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 02/17/2016 by John Lenski Jr

Smoke, Carbon Monoxide NG Alarm.

Very helpful customer service and quick delivery of the smoke alarms. Everything is setup and functioning as advertised.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 01/20/2016 by Jerome  Karwoski

Smoke, Carbon, gas alarm

Great product and easy to install.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 01/19/2016 by Richard Abrams

Perfect fit for a replacement.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 01/04/2016 by phillip slimak

replacement alarm

I wanted a plug and play replacement. This was ready out of the box and had CO and natural gas warning as well, something the old alarm did not offer. I am glad I brought an extra.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 12/30/2015 by Albert Scappaticci

Easy!

Just remove old unit plug in new one! That's it!

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 12/30/2015 by Cindy Armstrong

I was delighted that the new version fit my older versions mounting brackets with no adjustment at all. I now have a houseful of new detectors.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 12/04/2015 by James P

Replaced existing unit

I had an older version of this model which stopped working and would randomly chip. Ordering the replacement was a breeze, and it was shipped on time. The unit was pretty much plug and play with no issues whatsoever. Recommend and would buy again hopefully not very soon.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 12/04/2015 by Rodney Heining

Happy with service.

Easy to install and it fit perfectly.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 11/30/2015 by John Uphues

It Works Great

Had no problems to replace a previous model with this updated version. Everything working as advertised.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 11/20/2015 by Carlos Smith

USI Electric Hardwired 3-in-1

Purchased a hardwired 3in1 alarm. Easy install works great so far. Seems to be a quality device.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 11/19/2015 by Gary Gregory

Simple Install - Feel Protected

Easy process for installation and now I feel like my family is better protected in our home. Everything works like a champ.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 10/21/2015 by Roger Long

Alarm replacements

Time to replace the 5-year-old alarms. These were perfect, brand-for-brand, with the added convenience of fitting the existing brackets!

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 07/02/2015 by Cecilia Retirado

This product gives me peace of mind. I don't have to worry for any expired/old batteries.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 02/18/2015 by Elaine Twyman

works great!!! At first was concerned couldn't find one, but it worked great.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 01/19/2015 by Wanda Wagner

Works as expected

Straightforward installation, works as expected

View More Reviews...
Write A Review For This Product Review

New Technology

  • Sensing Plus smoke alarms

    Sensing® Plus

    AI-artificial intelligence can classify smoke & fire profiles.

  • universal smoke sensing technology

    USST Dual Sensing

    Responds to both fast flaming and slow smoldering fires.

Secure Checkout

Payment Options

About USI Store

  • Protect My Home
  • Protect My Property
  • Community Outreach
  • Store News
certified carbon neutral company - eaccess solutions

Customer Service

  • Order Status
  • Bulk Ordering
  • Fundraising
  • Customer Help
eAccess Solutions, Inc. BBB Business Review
Universal Secuirty Online Store

Sign up to receive special offers.

© Universal Security Instruments Store, Inc. All rights reserved.

  • Privacy Policy
  • Terms of Use
  • Accessibility Statement
  • Contact Us