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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.
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Average score based on 93 reviews
Good Alarm / Detector to Harness Quality Questionable
Reviewed: 01/18/2021 by Adam Levin
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.
Pleased
Reviewed: 01/18/2021 by Sajish Jacob
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.
USI 3 in 1 detectors
Reviewed: 01/07/2021 by Stephen Gonzales
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!
Easy to Install
Reviewed: 11/26/2020 by Dr Jack Rink
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.
Easy replacement
Reviewed: 10/27/2020 by Regina Hamlin
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