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  • 120 Volt AC Wired-In.
  • 9 Volt Battery Backup.
  • Mounting Hardware Included.
  • Tamper Resistant Locking Feature.
  • Battery Activation Pull Tab.
  • Heavy Duty Battery Included.
  • Loud 85dB alarm.
  • Listed to UL217 Standard.
  • Can be used to replace the USI-1208 or SS-790 alarm (Uses same bracket).
  • 5 Year Limited Warranty on Alarm.
The USI Electric USI-1209 Hardwired Ionization Smoke and Fire Alarm responds quickly to fast-flaming fires to protect your family against deadly threats in the home. Perfect for new or replacement installations, the 120-volt AC hardwired alarm is suitable for houses, apartments and mobile homes. This alarm features Smart Interconnect to connect up to 18 units. The 9-volt battery (included) provides continuous protection in the event of a power outage. Ideal for replacement of existing smoke alarms, this alarm features a large mounting plate for coverage of drywall impressions or old paint marks. The red LED light flashes when smoke is detected and the green LED light indicates that the power is functioning. Full dust and contaminant covers protect the device from spray applications, so you will not need to remove the alarm during any construction procedures. This smoke and fire alarm is UL Listed, California State Fire Marshal approved and Federal Housing Authority (FHA) approved to exceed industry standards. For maximum protection, install an alarm inside every bedroom, outside every sleeping area and on all levels of the dwelling.

The USI Electric USI-1209 Hardwired Ionization Smoke and Fire Alarm comes with a 5 year limited warranty. USI Electric is a subsidiary of Universal Security Instruments Inc., a U.S. based manufacturer of high quality, easy-to-install home safety products. Founded in 1969, Universal Security Instruments has over 40 years of heritage in providing home safety products for families. With state-of-the-art manufacturing facilities, Universal Security Instruments continues to launch revolutionary new products and technologies with the mission of always working to keep families protected.
Product Details
Product Specs
Smoke Alarms
Product Manuals
USI 120-Volt AC/DC Wired-In Ionization Smoke Alarm USI-1209HA Video

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USI-1209HA customer reviews

Overall Rating

14 Reviews
14 customers recommend this product
USI 120-Volt AC/DC Wired-In Ionization Smoke Alarm USI-1209HA Reviews
October 20, 2016
Verified Purchase

Snapped right in.

Kelso David Wallace
September 29, 2016
Verified Purchase
Exact replacement.

Units replaced in 5 min. Without any problems

Margaret Saux
September 21, 2016
Verified Purchase

I am glad to have found the same model of Smoke Alarms that I had in my home. I hope when I have the fire dept. install them that all 5 alarms do not start going off at the same time. This is what happened before. Do you know if there is 1 master unit and if so how can it be determined?

sepehr nasseri
September 15, 2016
Verified Purchase
Will buy again

Great product. Just as described.

Aaron Bennett
September 13, 2016
Verified Purchase
Prompt Delivery and Easy Set-up

I purchased these smoke detectors because the previous version of them was installed in the house for the last 11 years. Got the latest version and plugged them in after removing the last ones. No wiring required and super convenient.

Marie Clark
August 30, 2016
Verified Purchase
Replacement Smoke Detectors

We did not notice that our hard wired smoke detector had expiration dates until a couple of them began to alarm and would not stop although there was an absence of smoke. These replacements fit perfectly into the casing that were installed 10 years ago with simply joining the connection. Easy fix for expired smoke detectors.

Joseph  Fontenot
August 16, 2016
Verified Purchase
USI Smoke alarm

Perfect fit and great instructions. Plug and Play, so easy to install. Recommended to all.

August 10, 2016
Verified Purchase
No complaints

Exact fit with older model.

Brian Stanley
May 18, 2016
Verified Purchase
Great Replacement Dectectors

These were a great replacement to my current ones that are over 10 years old and have been discontinued.

Debra Stec
March 3, 2016
Verified Purchase

We put them all up and all are working beautifully.

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