USI 3-in-1 Hardwired Smoke, Fire & Carbon Monoxide Smart Alarm with 10 Year Tamper-Proof Sealed Battery (MIC1509S)

- Reviewed: 03/11/2022 by Stanley C

Easy Replacement

The original alarms were due to be replaced in our house and choose the same USI replacements. The mounting bracket had to be changed but overall the project was very easy and quick. Having the 10 year battery is great because we are away a lot and one time a neighbor called us to tell us our alarm was beeping. The battery had to be changed and we were out of town. This model gives us peace of mind when away.

- Reviewed: 02/28/2022 by michelangelo w

QUICK DELIVERY. PRODUCT WAS PERFECT

- Reviewed: 02/26/2022 by Dennis L

So far, so good

No problems so far.

- Reviewed: 02/21/2022 by Julius E

Easy Install

Easy switch from my previous alarm. I just had to switch out the bracket and plug it in.

- Reviewed: 01/25/2022 by Oliver B

Great

Great

- Reviewed: 01/22/2022 by George L

Easy D-I-Y project

Easy to replace using the existing house wiring. Placement on the existing junction boxes works well with white ceilings. If the ceiling was repainted around the original smoke detector, mounting the plate can be a challenge. Easy to set up once the power is turned on.

- Reviewed: 01/19/2022 by Barbara E

Great smoke detector

I replaced 7 detectors, I'm a senior citizen and I had no problem. I did have to replace mounting brackets, but harnesses were the same. I hope they live up to their 10 year battery life.

- Reviewed: 01/17/2022 by Stephanie D

I remain satisfied

I'm a small-property owner That has recently discovered the USI product line. Now that I have, I'm using the products to replace defective units. The service and shipping are also top-notch.

- Reviewed: 01/17/2022 by Shawn N

Fast delivery

Good price fast delivery

- Reviewed: 01/10/2022 by Thomas F

Easy replacement for the MICN-109

After ten years, my MICN-109 needed replacement but had been discontinued. This was listed as the recommended replacement, and it was a snap to make the change. I was very relieved.

- Reviewed: 01/09/2022 by James G

Works great!

I changed out my five smoke alarms with this upgraded model that has a 10 year battery and Carbon Monoxide alarm. These were easy to install and keeps our family safe! Well worth the price.

- Reviewed: 01/08/2022 by DANIEL J

Easy install

I am replacing the units in my house and these were easy to install.

- Reviewed: 01/04/2022 by Burhan Y

USS-710800

It was easy to install. Its been less than 2 weeks since I installed. No problem so far.

- Reviewed: 12/29/2021 by Mary S

it was easy to install.

- Reviewed: 12/25/2021 by edward h

Installation

Easy replacement for my older model detectors. Of course the 10 yr battery will need to wait for a review.

- Reviewed: 11/26/2021 by Eric H

Everything We Need

So far so good with this USI Smoke/Fire/CO alarm. Really appreciate having all three types rolled into one, as combo units like this one seem hard to come by, at least in the hardwired version. Will update as time goes on any issues occur, but very satisfied thus far!

- Reviewed: 11/12/2021 by Marla s

Smoke, Fire and CO Smoke Alarm

We received our replacement quickly and damage free.

- Reviewed: 11/02/2021 by john f

easy set up and installation. never replace batteries

- Reviewed: 10/29/2021 by Fernando Y

Great replacements

I got a new house to me that is fifteen years old with the original smoke detectors. I replace all of the with the USI 3 in 1 and the installation was very easy. The shipping was very fast. Overall very happy. I will buy two more that are left to change.

- Reviewed: 10/11/2021 by Kyle H

A good choice

The alarm was easy to install.

- Reviewed: 10/07/2021 by Robert M

Overall good

The product was easy to install except for the way it clips to the ceiling base. For some reason I had to loosen the base in order for the product to connect to the holding flanges on the base probably spent 2 hours working on it before I made that adjustment. Another way to connect would be helpful.

- Reviewed: 09/21/2021 by Christian L

USI 3-in-1 Smart Alarm

This 3-in-1 smart alarm replaces a USI alarm that has been discontinued. The smart alarm fit the current hardwire connections perfectly and easily fastened into place. As an added bonus, the alarm is designed with a 10 year battery that lasts the life of the alarm. So no need to ever change the batteries or deal with that annoying low battery chirp. Price for the alarm is good considering all its features.

- Reviewed: 09/21/2021 by David R

Perfect replace

My old alarm finally expired after 10 years, I'm glad that the replacement has a sealed battery so that it I don't have to remember to change battery every year. The wiring harness was a perfect match, change out took less than 10 minutes.

- Reviewed: 09/07/2021 by Andrew L

Matched with their lithium smoke detectors

I switched all my rental units with these. The only things I wish is the pigtails are compatible with other brand but hopefully this is the only time I have to replace the pigtail.

- Reviewed: 08/17/2021 by Tina G

Easy Replacement!

After 10 years, felt the need to replace these units. For me, they were super easy to install.

- Reviewed: 08/03/2021 by Beverly C

Easy replacement

I ordered this alarm replacing an expired one. It was easy and works great!

- Reviewed: 07/29/2021 by Michael M

Very Good Product

Easy to install, came as advertised, easy to understand instructions.

- Reviewed: 07/28/2021 by William R

MIC1509CS Review

Shipped and delivered promptly. Installed with ease.

- Reviewed: 07/21/2021 by Brian P

Does as expected so far

Was quick/easy to install. Thankfully no fires or CO incidents in my house yet, so as afar as I can tell it's doing what it should. I felt this was a better value than the competition. The price is cheaper paired with free shipping and it's just a goo deal. More importantly, feature-wise this checks all the boxes I was looking for.

- Reviewed: 06/19/2021 by Edward M

Excellent Product

Easy to install and works great.

- Reviewed: 06/17/2021 by Thomas G

3 in 1 10yr

Great product. Easy swap with old 9v version.

- Reviewed: 06/15/2021 by Kimberly E

3-in-1 hardwired smoke, fire & carbon monoxide smart alarm

Great smoke alarm so far so good haven't had any false alarms and no battery is required.

- Reviewed: 06/01/2021 by Francisco R

Excellent product

Excellent product and easy to install

- Reviewed: 05/31/2021 by Robert C

Hope This One Lasts Longer!

My home was built 2.5 years ago. There are a total of 5 smoke detectors in the house, with this one being the control. It's located in the hallway leading in from the garage, and is directly in front of the laundry room. The one that the builder installed failed about one year after I bought the house from the builder. I got a replacement from a local home improvement store, and it failed about a year later. It had a 2017 date on it, which I don't know whether that is the expiration date or the manufacture date. So I bought the replacement directly from USI. Hopefully it will last closer to 10 years.

- Reviewed: 05/29/2021 by Michael M

Great product

Ordered a replacement smoke alarm and it was delivered in 3 days, easy to install and works perfectly.

- Reviewed: 05/18/2021 by Rob v

Quick delivery and installation

Items were delivered on time - easy install. All as expected.

- Reviewed: 04/30/2021 by Theodore T

All set for 10 more years

very easy to install

- Reviewed: 04/26/2021 by Lou B

Carbon monoxide detector

They arrived as expected and 100% satisfied with the product.

- Reviewed: 04/07/2021 by Jeffery M

Outstanding product

Very good product. Easy to install and has 10 year battery

- Reviewed: 03/18/2021 by nabil ghabrial

Mr

Excellent product

- Reviewed: 03/18/2021 by JOHN RODTH

Easley installed as a replacement unit

- Reviewed: 03/08/2021 by Tramaine Tucker

Easy

Thank you. I have been looking for a replacement for awhile and glad I found your site. Perfect

- Reviewed: 03/08/2021 by LaMonte Thomas

Great Service

Fast delivery, great pricing and easy to install.

- Reviewed: 03/01/2021 by Robert Kanewske

Great combo alarm

Received exactly what I ordered and very quickly. Feel protected!

- Reviewed: 02/09/2021 by Brian Thunstrom

Excellent product

This is the perfect product for your home and one of the only 3 in 1s in the market. Both types of smoke/fire detection and carbon monoxide all in one unit. All hardwired and with a ten year backup battery. You can't go wrong with this.

- Reviewed: 01/25/2021 by Catherine McInnis

Excellent product.

I receive my items on time. They were exactly what I ordered.

- Reviewed: 01/18/2021 by Adam Levin

Good Alarm / Detector to Harness Quality Questionable

I gave this a good rating because it seems like a good alarm from a technical perspective the alarm alerts for smoldering and flaming fires and carbon monoxide. I purchased two of these alarms to replace one smoke alarm that was no longer working and one that was coming up on 10 yrs from installation. I wanted interoperability between the other hard wired smoke alarms in my house US1204 and the newly purchased smoke alarms. After testing it appears that the interoperability does work. I found that attaching the detector to the harness was a bit difficult and design was cheap. In fact, one of the prongs broke off the back of the detector and I had to re-attach the prong before attaching to the harness. The US1204 seemed to have a better harness / attachment design. But it was quick to uninstall and install other than the one issue with the prong breaking off. Overall, would give the detector a good rating.

- Reviewed: 01/18/2021 by Sajish Jacob

Pleased

Good quality. Easy installation.

- Reviewed: 01/14/2021 by David Farber

easy to swap them out came right away

- Reviewed: 01/12/2021 by Jack Rogers

Soo far so good. glad that i will not have to change batteries.

- Reviewed: 01/07/2021 by Stephen Gonzales

USI 3 in 1 detectors

Received and installed 3 units. No install issues and shipment was super fast. Awesome fire / CO along with 10 yr battery and hardwire connections. Hopefully will not touch these for ten years other than weekly testing!

- Reviewed: 11/26/2020 by Dr Jack Rink

Easy to Install

Through guidance from your company were were able to replace our old USI 11 year old units with the exact new ones to be able to only have to plug them in without the wiring task. Great support! Clear Instructions too.

- Reviewed: 11/19/2020 by Eric Bartz

Easy to deal with the on line store. Product arrived quickly, and matched up to the existing fitting.

- Reviewed: 10/27/2020 by Eric Bartz

Easy to deal with the on line store. Product arrived quickly, and matched up to the existing fitting.

- Reviewed: 10/27/2020 by Regina Hamlin

Easy replacement

Our previous alarm was 10 years old and had died. The model number was a match for this unit to integrate with our existing other alarms in the house. Did not have to change anything other than two screws to remove the old mount plate and put the included mount plate up. Plugged our wiring harness into the unit, mounted, and works great! Easy and affordable replacement.

- Reviewed: 10/02/2020 by Rob Warner

Easy install

- Reviewed: 09/27/2020 by Michael Kupneski

Nice upgrade

Easy upgrade for my old smoke detector.

- Reviewed: 09/21/2020 by Lewis Morant

Great Smoke Detectors

Great detectors, the second house I have used them in. Easy to install and you can't beat the 10 year sealed battery.

- Reviewed: 09/19/2020 by Steve Pirozzi

MIC1509S

Packaging was not very durable but luckily the alarm was not damaged during shipping. Easy to install.

- Reviewed: 08/27/2020 by Kevin Thorp

Perfect Replacement

Purchased as replacement for 12 year old alarms that were no longer working. Easy to install and work great! Peace of mind with little work at a reasonable price.

- Reviewed: 08/25/2020 by Brandon

Quick Install

Replaced existing 10+ year old hardwired USI detectors with no rewiring, just needed to swap the base plate. Quick and easy.

- Reviewed: 08/06/2020 by Carolyn Gibbs

Combo CO and Smoke Alarms

Would have Plugged into the old sockets, but were different so had to take the wires loose and put in the new ones that came with these. The red light is supposed to blink every two minutes, but it doesn't. The people at the company said that was OK and it works so am using them.

- Reviewed: 08/03/2020 by John Wilson

My Order

I was very well pleased with both the service and the product from the Univetsal Security Store.

- Reviewed: 07/28/2020 by John Bacolo

Replaced older unit perfectly!

- Reviewed: 07/13/2020 by Estella Woodard

Mrs.

My order for the smart alarm was received promptly and very well packaged. My smart alarm is currently in use and operates very efficiently.

- Reviewed: 07/10/2020 by Steven MacDonough

Quick and easy

Updated to new 3-in-1 unit with 10-year battery life. Ordered on website, delivery was very quick and installation easy.

- Reviewed: 06/26/2020 by ANNE RICH

Es La Ley!

Selling my home and have to replace all my smoke alarms with these babies. A little expensive but set em and forget em for 10 years. Think of all the batteries you won't have to change!

- Reviewed: 06/15/2020 by James Penuel

No batteries to replace

The primary feature that made me look at these devices is the 10 year battery. As I get older, I am more reluctant to climb ladders to replace batteries in the smoke detectors. This is a great solution.

- Reviewed: 06/10/2020 by Valerie Bruchmiller

Works!

Can't complain. Easy installation

- Reviewed: 05/27/2020 by Patrick J Lee

Perfect Replacement Multi Smoke Alarm

Plug n Play Replacement of my old Smokie that is no longer made. I changed out the base plate at the ceiling, plugged in the power connector and all was good. Also, pull tab for battery pulled prior to installing.

- Reviewed: 05/26/2020 by Nick Driggers

Excellent

Great product and easy to install.

- Reviewed: 05/22/2020 by Karen Tucker

We bought these to replace the ones in our house and were very pleased. When they arrived, my husband asked what I'd ordered this time. I had no idea what it could be because I wasn't expecting these to come in for at least another week. Shipping was VERY fast. Easy instillation and overall very pleased with the purchase.

- Reviewed: 05/21/2020 by JOSEPH NUGENT

Does the job

Direct replacement for existing unit. No issues on installing.

- Reviewed: 05/10/2020 by Steven Roberts

Replacement for old unit

This replaced a 10 year old smoke alarm. Nice upgrade with the combo unit. Appreciate the larger base.

- Reviewed: 03/11/2020 by Kevin Null

Easy installation and testing. Especially value the 10 year battery.

- Reviewed: 02/19/2020 by William Hackett

Home Smoke Alarm Replacement

All of the smoke alarms in my house had expired. Several were out of service due to false readings. These were updated direct replacements. The only reason I gave a 4, instead of a 5 on this review is because, one of the models used in my home had updated, and it is more difficult than it should be to cross-reference to a newer model number. New installations wouldn't have that issue.

- Reviewed: 02/05/2020 by Tom Cole

Nice looking units. Come with very nice paint shield installed that is easy to remove. Only negative is I liked the mounting base on my older USI smoke detectors better. They were stronger and deflected less when tightened and the screws from standard 4 octagon box fit the plate better.

- Reviewed: 01/05/2020 by ROSARIO DIPRIZIO

unit 2

Very easy to install. We had to replace the mounting plate by partially unscrewing 2 screws that did not have to be entirely removed. Next, turn the old plate and replace with the new mounting plate. Screw in the new plate, then plug in and attach the new unit.

- Reviewed: 01/02/2020 by DAVID OBERRY

Positive

Worked well as described

- Reviewed: 12/16/2019 by Joseph Griffin

MIC1509S

I am just installing these today so I cannot comment on false alarms or performance issues. However, I found it easy to replace my old USI hardwired units with the new units - the old and new use the same connector, so I only needed to install the new mounting plates.

- Reviewed: 11/11/2019 by E. Blackwelder

Smart Alarm

Very pleased with easy to install smoke alarm/carbon monoxide sensor. Will be ordering another for my home.

- Reviewed: 11/08/2019 by John F Russo

Pleased-2

excellent quality and simple installation

- Reviewed: 10/25/2019 by Drew Mason

Nice

Everything is good.

- Reviewed: 10/22/2019 by RL

MIC1509S Review

It's only been a couple of weeks since I've had it installed, but everything has been good so far. I chose this model because it was compatible with the previous ones locking mechanism. The built-in battery was attractive - I just hope it lasts 10 years as advertised. 10 years without that low-battery chirping!

- Reviewed: 10/07/2019 by Dwayne Davis

Easy installation

Great price, no battery for 10 yrs and simple quick install

- Reviewed: 09/30/2019 by David Scheib

Satisfied

Very confident in quality and performance of important safety equipment in our home.

- Reviewed: 09/23/2019 by Al

Product came as order and fit perfectly.

- Reviewed: 09/17/2019 by George Kramer

hgreat instructions and great product

I had it up and working in less than 5 minutes. Truly a quick replacement of the old to the new. Good job and great product.

- Reviewed: 09/17/2019 by Ronald Carver

Smoke, Fire CO Detector

A must have great product for a great price.

- Reviewed: 09/09/2019 by annette russo

super, easier to install

We are elderly, and have ten and twelve foot ceilings where these detectors are installed. The fire dept gives us free service, and it took exactly one minute to install. Great!!!

- Reviewed: 09/05/2019 by Michael Bohun

Direct Replacement of 1990s Smoke Detector

Replaced two hard-wired vintage 1990 smoke directors with two new USI 3-in-1 hardwired smoke, fire and CO Alarms. All hardware was included with 3-wire plug to detector. Detectors work in tandem if one sounds on main floor the one in the basement also sounds! The 10 year battery makes for worry free operation plus it has 3-in-1 detection.

- Reviewed: 08/23/2019 by Jack Welsh

Easy change over

Needed to replace 10 year old USI-7795 alarms when 2 of them would sound a double beep every couple of minutes. Realizing they should be replaced, the MIC 1509S was an easy change to just plug-in after changing the mounting bracket. All new an working as designed, good for 10 more years.

- Reviewed: 08/13/2019 by Hansen Su

Nice upgrade...

Easy to install, clean appearance, don't have to purchase a separate CO2 alarm and saves me from buying and replacing batteries every year. No down sides so far!

- Reviewed: 08/01/2019 by Melody Bacon

Web site easy to use, received item as ordered.

- Reviewed: 07/22/2019 by John Harper

Very pleased

Ordered combination fire/carbon monoxide to replace outdated fire only alarm. Very pleased with product.

- Reviewed: 06/25/2019 by Joe Bass

Very easy replacement of old alarm

Our 12 year old combination smoke and carbon dioxide detector finally quit working as evidenced by a repetitive chirping even after installing a new 9 volt battery so I went on a search for a compatible replacement. After googling my old unit it led me to USI's website where it listed this new unit for consideration. I was most concerned about minimizing the wiring changes needed since I would be perched on a 12 foot ladder and this unit used the exact same wiring harness which meant all I had to do was replace the plastic base that came with the unit and plug in the wiring connector. Working like a charm!

- Reviewed: 06/19/2019 by Joe

chirping alarm

We have a new home and this unit keeps chirping throughout the day as well in the night. I had to disconnect the unit. 1.5 years old

- Reviewed: 05/20/2019 by Edmund Armstrong

Carbon detector

Excellent detector and very professional staff at universal

- Reviewed: 04/30/2019 by Matthew Szenher

So far, so good

Only had the product for a few weeks, but it works as advertised so far.

- Reviewed: 04/23/2019 by YESENIA VALLE

Great buy!!!

I needed to buy new ones, the old ones were 10 year old. They work exceptionally well.

- Reviewed: 04/17/2019 by Mark Crain

Removed old detector and plugged new one in. Exactly what I was looking for! Great company to work with!

- Reviewed: 03/25/2019 by Greg Black

Replaced all 7 outdated smoke alarms with this USI 3-in-1 and am very happy. It was very easy to install and only had to change out the base and wiring on 3 of them.

- Reviewed: 02/19/2019 by Edward Bowleg

New all in one detectors

Received the products ordered was able to install both in about twenty minutes, insured that they sync with the other five and the job was complete. Will order more when the time comes again.

- Reviewed: 01/26/2019 by Sam Dolinsky

Perfect

The sealed 10 year battery was a selling point for us in addition to the breadth of protection. No more chirping or climbing the ladder. Great support from on line and store reps to choose the right units.

- Reviewed: 01/17/2019 by Jean Monaghan

Easy to install. Makes me feel safer knowing I have co detectors.

- Reviewed: 12/31/2018 by ARNOLD WILLIAMS

MIC 1509S

NO PROBLEMS INSTALLING THIS UPDATED MODEL OF MY OLDER ALARM. THE EXISTING WIRING PLUGGED INTO THE MIC 1509S EASILY.

- Reviewed: 11/20/2018 by Linda Neville

updated

We did not have a co detector downstairs and our upstairs one had reached its life limit so we added a hardwired co and they work great! Thanks for great service and product.

- Reviewed: 11/19/2018 by Robert Clapp

Replacement of 14 yr old alarm

Replaced a 14 yr old Smoke, Fire, Carbon Monoxide Alarm. Great that the new Smart Alarm has sealed backup battery. No more replacing batteries...Yeah.

- Reviewed: 11/13/2018 by Rachel Duncan

6-pack combo detectors

Product came on time and in good working order. Electrician had some difficulty installing them, but was able to work it out. Good value.

- Reviewed: 10/26/2018 by Rafael Acevedo

Smart Alarm

Received the alarm, pulled the tab. Pulled the old ring from the ceiling and replaced it with the new ring. Installed the alarm, plugged it in and done!

- Reviewed: 10/18/2018 by Tony Ellis

Order Processing

Order processing was straight forward. Selected the type of detector I wanted and submit my payment. Detector arrived ahead of schedule. Installation took all of 5-mins and detector was up and running.

- Reviewed: 10/17/2018 by Benjamin Gantcher

Good but is there a model with a battery as well as electrical connection?

It seems sufficient, but I'd prefer a model that can use a back-up battery in case of a power outage.

- Reviewed: 09/13/2018 by Bethany Pinkley

Love the 10yr battery!

- Reviewed: 09/06/2018 by William Blackburn

Replaced 9 volt battery one that would not clear carbon dioxide warning. So far so good. Fit in existing plate and connection

- Reviewed: 09/02/2018 by CORRINE ALGERMISSEN

Review

So far so good. No chirping! Am happy!

- Reviewed: 08/20/2018 by Bill Woolsey

Great product. Easy to install. Fast shipping.

- Reviewed: 07/26/2018 by Jeff Fogarty

Awesome product!

I love these 3-in-1 detectors. With no batteries to change and backwards compatibility built-in with their previous models you can't go wrong!

- Reviewed: 07/12/2018 by Don Rahaim

Replace older sensors

In just a matter of 20 minutes I was able to replace all of my older sensors 4 with the new 3 in 1 model. A quick change of the mounting plate and a pull on the battery tape and all was good to go.

- Reviewed: 07/11/2018 by Jorge Caliso

MIC1509S

I bought two of these items and I already installed them in my basement. So far, they haven't been misbehaving.

- Reviewed: 06/29/2018 by Leah Jaggernauth

Great Product

Fast delivery! Thanks.

- Reviewed: 05/20/2018 by Victoria Hope

I have always been happy with the products and services when I order from you. thank you

- Reviewed: 04/07/2018 by David Herron

Good upgrade

A good upgrade for older units

- Reviewed: 03/28/2018 by Roberta Bauer

great customer service

I ordered from USI after not being able to find the device I wanted on other sites bad filters, incomplete descriptions. Even USI lacked some information, so I contacted customer service and received prompt and clear answers to my questions. I ultimately ordered 6 devices which we were able to install ourselves.

- Reviewed: 03/26/2018 by Justin Frederick

Good alarm.

It was difficult to find a dual sensing alarm with CO and sealed battery. Glad I found this company. Great product. Easy to install.

- Reviewed: 01/30/2018 by Linda Pinder

Happy, happy customer.

Easy installation and excellent quality. I can't say enough good things about USI products. Their customer service was very knowledgeable and quickly responded to my questions.

- Reviewed: 01/05/2018 by Kevin Graham

works good

Hi, had to replace my detectors since they were starting to go off when I cooked. They were 10 years old. I ordered 2 iono detectors 3 photo detectors and 1 carbon monoxide one all 10 year sealed and wired ones. They all installed and worked good and solved my cooking problem. Also the customer service was very responsive and the items were shipped quickly A+. Kevin

- Reviewed: 11/07/2017 by Susan Apgar

Easy to assemble the perfect replacemement for the outdated one

- Reviewed: 11/02/2017 by Ann Hirsch

Smoke, Fire & CO2 Detector

When one of my smoke & co2 detectors needed to be replaced, I went online on the USI website. The model I had was no longer available. So I called and got help. I was given 3 choices for a replacement. I chose this one for the 10-year sealed battery. It's really annoying when those batteries go and the unit starts chirping. So far, I am very pleased.

- Reviewed: 09/21/2017 by Tyler

Replaced 2 older USI smoke detectors with 2 of these units. Simple installation and great that they have a sealed 10 year backup battery! Very nice to have 3-1 detectors connected to the other units throughout the house!

- Reviewed: 09/19/2017 by Leonard Ancona

USI 3-in-1 Hardwired Smoke, Fire & Carbon Monoxide Smart Alarm with 10 Year Tamper

Product I purchased works great. I will purchase all my units from Universal

- Reviewed: 09/04/2017 by Eric Schlegel

3in1 Hardwired Smoke, Fire and CO Alarm

Excellent product! Covers all 3 threats and is easy to install!

- Reviewed: 08/20/2017 by Peter Weiskopf

trick question

It's like, you got to lose to win. Or is it the other way around. My daughter bought her first townhouse. It had 5 USI 1204 units which were engraved that their lifetime expired in 1999. Well no sense in replacing the batteries. So I ordered a 5 unit box of the MIC1509S. They went in very easy didn't have to do any major surgery. Now do I have to wait for a fire or a CO event to rate these. Sorta hope that it doesn't come to this.

- Reviewed: 07/24/2017 by Rick Rose

All should have 10 year battery

- Reviewed: 05/22/2017 by Mark Wheeler

Replace existing units

This was as easy as it gets. The new units plugged directly into the existing wiring. The only piece I had to change was the plate as the dog ears are different with the new units. Will be buying some other replacements for smoke detectors.

- Reviewed: 02/09/2017 by William Dunbar

Excellent product

I replaced six USI 5304s with the 1509s. It was easy and gave our home protection against carbon monoxide in addition to smoke and fire. During the install of the sixth detector, the battery pull tab broke. Customer service shipped out a replacement immediately and made the return of the broken product convenient. Im very pleased with the product and USI support!

- Reviewed: 01/25/2017 by Gerald E Simpson

No problems! Easy to mount and works fine.

- Reviewed: 12/16/2016 by Ross Au

Bedroom hallway sensor

Purchased this detector to replace the old bedroom hallway unit. Way more comfortable with the three in one design this detector has for the sleeping level of our home. The 10 year battery makes this a install and forget instrument. Just need to hit the test button on occasion.

- Reviewed: 11/29/2016 by William Reupke

Smooth install

Local electrician quickly and easily replaced the existing 30-yr old interconnected detectors with the USI 3-in-1 detectors. Appearance of installation is very neat.

- Reviewed: 09/28/2016 by Edward Hollis

Second set from USI great product

Easy to install, great products, like the 10 year battery.