USI Electric Hardwired 2-in-1 Universal Smoke Sensing Smoke and Fire Alarm with Battery Backup (MDS107)

Reviewed: 06/19/2019 by Dale Steadman

works great

Very Accurate Description

Reviewed: 02/22/2019 by Tom De Martini

This alarm really works. It does respond well to even a small amount of smoke. I accidentally burned some food on the stove top and the alarm about 20 feet away started blaring. The only thing to realize is the potential for the smoke to get trapped inside an interior compartment of the alarm itself. The alarm will keep blaring if you reinstall it. When this happens there is no way to blow out the trapped air and the alarm must be replaced by a new one. This, however, could be true for any smoke alarm. Overall this alarm does work very well.

Replacement

Reviewed: 01/01/2019 by Pietro Dova

Nice to see that the pin connection remains unchanged from 2011. But for some reason the clamping system has changed from prior model so the ceiling mount needs to be replaced with the new one provided to re-attach the unit to the ceiling.

Easy install

Reviewed: 12/22/2018 by Jake Repash

Easy install and so far have worked good without any false alarms.

Replacement Alarms

Reviewed: 12/08/2018 by Wayne Jertson

I'm very pleased with my new Smoke/Fire alarms. Easy to install and test. Good product!

Replaced 6 Smoke and Fire Alarms

Reviewed: 11/02/2018 by Bruce E. Stuck

I discovered the USI Model 1204 Smoke and Fire Alarm Detectors in my home were 5 years beyond their 10 year lifetime! From information on the detector, I contacted USI, Inc. and was promptly sent an email that contained a video link on replacing the detectors. The link answered all my questions. Hence, I immediately ordered 6 Ea. MDS107 Smoke and Fire Detectors that arrived about 5 days later. I replaced and tested all 6 and they worked perfectly in our alarm system. The efficient assistance provided by Michele Metcalfe at USI, Inc., Owings Mill, Md was superb. Thanks for excellent customer service.

Reviewed: 10/10/2018 by Eugene Smith

First time ordering but was very happy with the quality service.

Happy Customer

Reviewed: 10/01/2018 by A.R.

I recently purchased this item directly from USI. Product arrived as expected and in the condition described on their website. Excellent Value..... Thanks

Pretty Much Plug and Play

Reviewed: 09/28/2018 by Greg Griffith

Very pleased with warranty support from my old house. I changed out all outdated models in my new home. Simple swap out from one manufacturer to another. 2 mounting screws and a pigtail. Also comes with battery so it's good to go.

New Smoke Alarms

Reviewed: 09/19/2018 by Kevin Kaari

I recently bought 10 new hardwired detectors to replace my existing USI detectors that aged out. The new ones installed quick and easy. No issues with any of them. I am happy with my purchase.

Replace old units

Reviewed: 09/15/2018 by Chester Hewitt

Installation of new smoke and fire detectors was simple and easy, mounted to existing boxes with ease and rewireing was also simple.

Reviewed: 09/10/2018 by Joseph Armstrong

Well satisfied with my purchase! Four units boxed together for shipping. New 9-volt battery included in each unit. Relatively easy to replace / install. MDS107 is well designed and engineered. Battery drawer is a wonderful design change over my original USI detector. Original detectors manufactured in 1999 or 2000. If offered, I would rate my MDS107s as a 6 - Outstanding.

Mds107 review

Reviewed: 05/07/2018 by ruth betcher

The alarms installed wonderfully easy. They are great.

Best Ceiling Option

Reviewed: 05/02/2018 by Kristin Pardue

Best option as CO should be monitored down low, not on ceiling. Easy installation.

Replacing old hardwired alarms

Reviewed: 03/23/2018 by Charles Dove

Replaced whole home hardwired ion alarms that were over 10 years old for my parents. Have these alarms in my home for a few months now and am well pleased. Learned from research that photoelectric alarms provide needed coverage in addition to ion technology alarms. These are among the best priced alarms that have both types of sensors.