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The Universal Security Instruments Hardwired MIC1509S 3-in-1 Smoke, Fire and Carbon Monoxide Smart Alarm provides 10 years of continuous protection against three deadly threats within the home. New patented Universal Smoke Sensing Technology offers the benefits of both photoelectric and ionization alarms in one device to protect against fast flaming and slow smoldering fires. This detector also features protection against the silent killer - carbon monoxide - making it a 3-in-1 device. The ideal addition for new or replacement installations, this maintenance-free alarm is suitable for houses, apartments and mobile homes in every room.
This USI Combination Alarm utilizes a sealed back-up battery (included) that will never have to be replaced throughout the life of the alarm, giving you a decade's worth in peace of mind even in the event of a power outage. Permanent Power battery backup also saves money from battery replacements (up to $38.00 over the 10-year life of the alarm), eliminates annoying low battery chirps and helps the environment by reducing environmental waste from disposed batteries. This alarm features microprocessor intelligence to completely eliminate nuisance alarms, a single silence/test button to quiet a non-hazardous alarm and an end-of-service life warning that sounds when it's time to replace the alarm (approximately 10-years from activation).
This USI Alarm conforms to UL217 and UL2034 standards. It is also California State Fire Marshal approved and Federal Housing Authority (FHA) approved to exceed industry standards. The Universal Security Instruments MIC1509S 3-in-1 Smoke, Fire and Carbon Monoxide Smart Alarm comes with a 10-year limited warranty that covers both the battery and alarm.
Average score based on 153 reviews
- Reviewed: 12/30/2022 by Gerald L
very easy to install, used as an replacement
- Reviewed: 12/02/2022 by Todd D
Works as expected
Bought to replace an existing USI smoke and CO detector that had reached its ten year end of life. Only issue is that I had to use the new mounting bracket since the new unit was not compatible. However, the three-wire connector from the old one did fit into the connector for the new one. Has been in service for several weeks with no unexpected alarms. Would buy again.
- Reviewed: 10/19/2022 by Kimberly R
Dry good alarm
- Reviewed: 08/25/2022 by John N
Excellent product. Easy to install.
- Reviewed: 08/03/2022 by Michael F
My house is now 10 years old and my smoke detectors are beginning to fail.theUSI3 was easy to install. I no longer have to worry about changing batteries
- Reviewed: 07/13/2022 by John H
Replaces obsolete USI detectors with no problem
- Reviewed: 06/28/2022 by Greg C
Great product with 10 year battery!!! Easy to replace aged product 10 years old. A ladder and a screw driver was all that was needed. Better now! Thanks!
- Reviewed: 05/18/2022 by Ruth C
New smoke and CO2 detector
10 year sealed battery. Easy to install
- Reviewed: 04/29/2022 by Justin P
Easy to install and delivered in a timely matter
This is exactly what I needed. Is easy to install and also the expiration date is 10 years away. There was no damage to the package and it came within a few days after ordering.
- Reviewed: 02/10/2023 by Tim O
We use this product because that was what was in our house when we moved in. We have never had one last 10 years though.