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The Universal Security Instruments MDS300B Smoke and Fire Alarm responds quickly to both fast-flaming and slow-smoldering fires to protect your family against deadly threats in the home. Perfect for new or replacement installations, the MDS300B 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 smoke and fire 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. A Duracell battery (included) operates the alarm and continues protection in the event of a power outage.
This 2-in-1 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 a smoke alarm inside every bedroom, outside every sleeping area and on all levels of the dwelling. The Universal Security Instruments MDS300B Battery-Operated Universal Smoke Sensing Smoke and Fire Alarm comes with a 10 year limited warranty.
* California and New York Residents - Please note this alarm is not compliant with your State's 10 Year Sealed Battery Alarm Legislation Requirements.
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Average score based on 7 reviews
- Reviewed: 02/03/2022 by Carol G
So far they're working great.
- Reviewed: 09/21/2021 by PHYLLIS R
Appears to be working
I previously bought a 10-year battery warranty smoke detector from another company. It was constantly go off and was very difficult to stop. So I returned the smoke detector and bought this smoke detector and so far it's working with no problems
- Reviewed: 08/18/2021 by John S
Universal Smoke & Fire Alarm
Product works as advertised and was easy to install
- Reviewed: 01/05/2021 by Carl Griffiths
Best value dual sensor detector
I did a lot of research prior to purchasing 7 of these units for my home. They are the best value dual sensor units on the market and perform really well. I opted for these over the 10yr life battery version as I don't necessrily believe the battery will actually last 10yrs and I will end up having to replace the whole unit. These units come with a Duracell 9V included. I did get one bad unit out of the seven I ordered, the customer service took care of it for me and sent a new one and return label right away.
- Reviewed: 01/17/2020 by Daryl Ford
Received the MDS300B and immediately tested it. It is a major improvement over the older, false alarm sensors that were installed in our home during construction. Very pleased with this sensor and will soon be ordering a second.
- Reviewed: 01/14/2019 by Wendell Kalayjian
Very good smoke and fire alarm.
- Reviewed: 05/14/2018 by Wendell Kalayjian
2 in 1