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The USI Electric MDSCN111 Hardwired Smart Alarm is a 4-in-1 device that provides quadruple the protection with a single installation. This 120-volt AC alarm protects against (4) deadly household threats: fast-flaming fires, smoldering smoke, carbon monoxide and natural gas (or methane). Perfect for new or replacement installations, the MDSCN111 alarm is suitable for houses, apartments and mobile homes. Universal Smoke Sensing Technology responds 87-percent faster to slow smoldering fires and responds quickest to fast-flaming fires. Auto sensitivity calibration provides superior nuisance alarm protection and creates consistency in alarm sensitivity.
This 4-in-1 alarm has additional automatic features including: a self-diagnostics check to ensure proper operation, a sensitivity adjustment for changes in temperature or humidity and an end-of-service life warning that sounds when it's time to replace the battery. The 9-volt alkaline battery (included) continues protection in the event of a power outage. This combination alarm features a front-loading battery drawer for replacing the battery without removing the detector from the bracket. Mount the bracket to any standard wiring junction box and use the large mounting base to cover imperfections in drywall. For maximum protection, install an alarm inside every bedroom, outside every sleeping area and on all levels of the dwelling. The USI Electric MDSCN111 Hardwired Universal Smoke Sensing Smart Alarm comes with a 7 year limited warranty.
Average score based on 61 reviews
- Reviewed: 09/14/2022 by David M
Purchased this item to replace a unit previously installed by the builder of our home and that had reached its life end. The unit was extremely easy to install. Only had to change out the mounting plate. Michelle in customer service was extremely helpful when I called in to inquire about the new model number for this unit.
- Reviewed: 08/22/2022 by David H
Installation went smoothly
These 2 detectors replaced 2 older multi-sensor detectors that were reaching end of life. Everything needed came in the new boxes including mounting plates and wire assemblies. Smooth install in about 5 minutes each
- Reviewed: 03/22/2022 by John C
I needed a whole house replacement for new construction detectors that were at end of life and got a good deal on upgraded 10 year battery models and got a few more carbon monoxide detectors to cover every bedroom and added a natural gas detector. Replacing the ceiling mount bracket and a couple wiring pig tails was not too hard. Very happy to not have to replace batteries and to have the best protection for my family.
- Reviewed: 03/18/2022 by Bridget L
Very happy with my sales representative and the order I received.
- Reviewed: 02/04/2022 by Roger A
Great alarms that detect Smoke, Heat, Carbon Monoxide and natural Gas
I am so comfortable knowing that the alarms will detect all the hazards mentioned on the Review Heading. We have installed these on the three wood framed homes we have had since 1977 through today. While we have not had them go off in “anger” when we were asleep but we fell much better knowing we have these alarms on every room especially now that we are on our late 70s. They have each lasted over the 7 years stated and generally 8 years or more. We have also had a couple of friends during this who had fires in their homes which were not detected until the fires were really going but they luckily were unhurt but the damage was significant but not too bad. We have had gas cook stove where the pan overflowed and the gas flames were doused and gas was going into the house undetected. Thank God it was detected in time before we were gassed. It is so easy to be playing with the small kids and not smell the gas on another room in the house. A Neighbour jumped over our 6 foot fence between our yards as he realised the alarm was serious. These incidents detected early saved lives / damage to our kitchen. So thanks for the 4 in 1 alarms.
- Reviewed: 10/03/2021 by Nathan T
I purchased two 4 in 1 detectors. Replaced my old detectors and networked together seamlessly.
- Reviewed: 08/03/2021 by franco b
good product and went on easy
- Reviewed: 08/02/2021 by franco b
Easy to install
- Reviewed: 08/02/2021 by Taaseen H
I thought this will be tricky to install but it was much easier to install than I thought. If you have basic knowledge then it's a breeze.
- Reviewed: 01/26/2023 by Alvaro G
Your product is good, good thing I can find it on line, otherwise I would have had to change every unit thru the complex I give you all a big 5