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  • 10 year sealed batteries provide continuous protection-even in the event of a power outage
  • Lithium-Free Permanent Power from Duracell Duralock Power Preserve Technology
  • Eco-Friendly-Reduces environmental waste & eliminates disposal of up to twenty 9 volt batteries
  • Maintenance Free Battery Power - No batteries to replace for the life of the alarm
  • Tamper proof design provides a higher level of security and prevents battery removal
  • Interconnectable with up to 24 compatible USI Electric alarms and devices
  • Saves money-Never replace batteries for 10 years, saving up to $38.00 over the life of the alarm
  • Eliminates annoying low battery chirps
  • Photoelectric Technology is typically more effective at detecting slow smoldering fires
  • Drift compensation feature allows alarm to auto adjust sensitivity if the photoelectric chamber becomes dusty or dirty over time-further reducing nuisance alarms
  • Smart Alarm Technology Provides:
    • Quick Find Alarm Origination Locator
    • Temperature & Humidity Compensation
    • Self Diagnostics to ensure alarm is functioning properly
    • Superior Nuisance Alarm Resistance
    • 10 Year Product End-of-Service Life Warning
  • Deactivation key switches alarm off and makes alarm ready for disposal
  • Lock-out feature prevents deactivated alarm from being reinstalled
  • This alarm is suitable for installation in houses, apartments, dormitories and manufactured housing
  • Fast & easy to install. Perfect for new or replacement installations
  • For added security, tamper-resistant locking feature prevents unwanted alarm removal
  • Larger mounting base covers drywall imperfections and old paint marks
  • The single silence/test button temporarily quiets nonemergency alarms and tests alarm functionality
  • Meet New Laws & Legislation-This alarm exceeds industry standards, and ETL listed to UL Standard UL 217 and California State Fire Marshal approved
  • 10 year limited warranty on both battery and alarm
The Universal Security Instruments MP116S Photoelectric Smoke and Fire Smart Alarm provides 10 years of continuous protection against deadly threats in the home. The utilization of Photoelectric Technology allows for increased efficiency in detecting slow smoldering fires. Perfect for new or replacement installations, this maintenance-free alarm is suitable for houses, apartments and mobile homes. The sealed battery (included) 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 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 detector features smart alarm technology to assist in completely eliminating 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 battery (approximately 10-years from activation).

The perfect replacement for existing Universal Security Instruments Alarms, this unit features a large mounting base to cover imperfections in drywall and the option to replace retrofitting applications. The quick deactivation key switches the alarm off and makes the batteries safe for disposal. Once the alarm is deactivated, the tamper resistant feature turns on to prevent deactivated alarms from being reinstalled.

This alarm exceeds industry standards by meeting new laws and legislation. The Universal Security Instruments MP116S Photoelectric Smoke and Fire Smart Alarm is ETL listed to UL Standard UL 217 and is also California State Fire Marshal approved.
MP116S30 year battery smoke alarm
Product Details
Product Specs
Smoke & Fire Alarms
Product Manuals
USI Hardwired 10 Year Photoelectric Smoke & Fire Smart Alarm (MP116S) Video

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MP116S customer reviews

Overall Rating

12 Reviews
11 customers recommend this product
USI Hardwired 10 Year Photoelectric Smoke & Fire Smart Alarm (MP116S) Reviews
Ruth Gately
September 11, 2019
Verified Purchase

This is a gift not given yet.

Angela French
August 1, 2019
Verified Purchase
Replace Home Smoke Alarms

While these alarms are pricier than some of the others I elected to purchase them because the lithium battery would mean no changing of batteries, and its not easy to get to some of my detectors and I can get unbalanced fast on a ladder! The Customer Service email contact was EXTREMELY helpful with both tech information and the right alarm to get for the hardwire I already have. I shared with others in my neighborhood this information on our blog!

Alex K
June 19, 2019
easy to install, no false alarms so far

This smoke alarm was easy to install, uses the same kind of connector as Kidde alarm it was replacing. No false alarms so far.

Marion Eldridge
June 3, 2019
Verified Purchase

So far, great! Very easy to install.

Rick Stephens
June 3, 2019
Verified Purchase

Arrived promptly and was easy to install. Should do me for 10 years but it was nice that you did what you said you would do.

Donald Boyle
May 13, 2019
Verified Purchase
Easy Install

Easy to install and just the combo function that I needed.

Michael Goldflam
January 20, 2019
Verified Purchase
Great product

The USI products are excellent. Easy to install, great service, excellent products

Margie nash
November 16, 2018
Verified Purchase
Fast Delivery

Received quickly,as described. Need to find an electrician to install. Thanks for good service

steve sullivan
November 6, 2018
Verified Purchase

Had to replace older model with new ones hope they last longer

Steve Bullum
September 10, 2018
Verified Purchase
Great fit & function

Exactly what i needed. Slim design, great technology, and ease of installation. However, the plastic battery protector pull tab on 1 out of the 5 tore off incorrectly. It's unretreivably stuck inside which caused it to not activate. In process of getting a replacement.

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