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  • Ionization Smoke and Fire Alarm
  • 120 Volt AC Wired-In
  • 9 Volt Battery Backup
  • Loud 85 dB Alarm
  • Improved Nuisance Alarm Resistance
  • Quick Draw Battery Drawer
  • Test/Silence Button
  • Power and Alarm LED's
  • Super Heavy-Duty Battery Included
  • 2 Tamper Resistant Locking Features for Alarm and Battery
  • Interconnectable with up to 24 Compatible Devices (USI and Universal 120V Alarms included)
  • Ideal for Homes, Apartments, Dormitories, Manufactured Housing and Mobile Homes
  • Listed to UL217 Standard
  • California State Fire Marshal Approved
  • 10 Year Limited Warranty
Manuals

The USI Electric 5304 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 USI Smoke Detector is suitable for houses, apartments and mobile homes. Quick Find alarm origination identifies the first alarm to sound in an interconnected system and the single silence/test button temporarily quiets nonemergency alarms. The 9-volt alkaline battery (included) provides continuous protection in the event of a power outage.

This smoke and fire alarm also features a quick activation pull-tab and a front-loading battery drawer for replacement without removing the alarm from the bracket. Mount the bracket to any standard wiring junction box and use the large mounting base to cover imperfections in drywall. The plastic dust cover protects the alarm from debris and (2) tamper-resistant locks prevent unwanted alarm or battery removal. For maximum protection, install an alarm inside every bedroom, outside every sleeping area and on all levels of the dwelling. The USI Electric 5304 Hardwired Ionization Smoke and Fire Alarm comes with a 10 year limited warranty.

Recommended replacement for the following obsolete models:

  • USI-1204, USI-1208, USI-1213
  • USI-5204
  • SS-2795, SS-790
Replacement Installation Guide
WHY DOES MY SMOKE ALARM 'CHIRP' APPROXIMATELY ONCE EVERY MINUTE?
The smoke alarm chirps to indicate a "low battery" condition, meaning the battery needs to be replaced. Battery powered smoke alarms will chirp a minimum of 30 days before the battery completely loses power.

AC powered smoke alarms with battery backup will chirp indefinitely assuming AC power is present; if battery power is low, or battery is removed; until a fresh battery is installed. Approved replacement batteries are listed on the back of each smoke alarm and in the user's manual.

Certain model smoke alarms with a silence button (designed to silence the alarm during a nuisance alarm) may chirp to indicate the smoke alarm is in the silence mode. The chirp will stop after approximately 8 minutes and the smoke alarm will return to its normal operation.
WHAT DOES IT MEAN WHEN THE RED LIGHT ON THE ALARM FLASHES APPROXIMATELY ONCE EVERY MINUTE?
The flashing red light gives a visual indication that the smoke detector is functioning properly. It also indicates a working battery is connected to the smoke alarm.
WHAT DOES THE CONTINUOUS GREEN LIGHT ON MY SMOKE ALARM INDICATE?
When a green light is present on your smoke detector, it means that AC power is currently operating the alarm.
THE GREEN LIGHT ON MY SMOKE ALARM HAS GONE OUT, WHAT DOES THIS MEAN?
If the green light on your smoke detector is not on, it means the AC power has been interrupted to the alarm. Check the circuit breaker and AC wiring to make sure power is still reaching the smoke alarm.
HOW CAN I TELL WHICH SMOKE ALARM IN A MULTI-STATION SYSTEM INITIATED THE ALARM?
When interconnected alarms are alarming, the smoke alarm which initiated the alarm, either by test button or sensing smoke, will flash the red LED light approximately once per second. The red LED light on the other non-initiated interconnected smoke detectors will not be lit but will sound the alarm.
HOW MANY SMOKE ALARMS OR DEVICES CAN BE INTERCONNECT AT ONE TIME?
The NFPA 72 standard states the interconnect limit is 12 smoke alarms and up to 6 other alarms (heat alarms or carbon monoxide detectors) for a total of 18 total alarms. With 18 alarms interconnected, up to an additional 6 relay modules may be interconnected (for a maximum of 24 devices).

If battery backup alarms and non-battery backup alarms and accessories are mixed in an interconnect system, all devices without battery backup WILL NOT operate during an AC power failure.

CAUTION: USI alarms and accessories should only be interconnected with other USI alarms and accessories. Connecting devices from another manufacturer to USI devices may result in nuisance alarms, failure to alarm, or damage to one or all of the devices in the interconnect system. All interconnected USI alarms should be powered by the same fuse or circuit breaker. Smoke alarms shall not receive their power from a circuit that is protected by a ground fault circuit interrupter. Improper connection will result in damage to the alarm, failure to operate, or a shock hazard.
Product Details
Product Specs
UPC:
042741053044
MPN:
5304
Category:
Smoke & Fire Alarms
Product Manuals

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169 Customer Reviews

4.9 Overall rating
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USI Electric Hardwired Ionization Smoke and Fire Alarm with Battery Backup Reviews
Michael B
December 4, 2023
Verified Purchase
Replacement for 20 year old USI detectors

Didn't know I had to ever replace these but upon changing the battery on an original one that came with the house, it said 2004 and replace every 10 years. I ordered these as the new replacement for the old part number. Came as promised. I had to rewire the connection to fit the new plug design. Came with 9 volt batteries. 9 of the 10 went in smooth but the 10th one set off the other 9 after rewiring twice. I swapped it with the 9th one and it solved the problem. Not much else to say. I tested them and they beep. Hopefully good for another 10 years.

Barnett J
November 29, 2023
Verified Purchase
Good product, quick delivery

We have been getting our smoke detectors here for years and have never had any issues. Always quick delivery & have not had any issues with the product.

Dan B
November 23, 2023
Verified Purchase
Great place to do business

I appreciate their customer service. They are so helpful ,friendly and professional. Their prices are better.

Ron and Phyllis d
December 1, 2022
Verified Purchase
Smoke and Fire Alarm.

Very easy to order and shipped right away. All products were in good shape. Will order from you again. THANK YOU !

Milind D
November 28, 2022
Verified Purchase
Easy install but harness has to be changed

The fire alarms were very easy to install but the harness changed slightly between the 5204 and 5304 models. The mounting bracket also had to be replaced as they were slightly different. If everything was same, it would have been just unhook and plug-in.

Lorraine B
October 31, 2022
Verified Purchase
Replacements

The little suckers were tricky to twist-snap together once up on the ceiling. Sure would have been nice if the screws were included as well. Otherwise they units arrived timely and weren't very expensive for replacements.

David M
September 14, 2022
Verified Purchase
Model 5304

Purchased this item to replace two units previously installed by the builder of our home and that had reached their lifes end. The units were extremely easy to install. Only had to change out the mounting plate.

LAURA M
September 6, 2022
Verified Purchase
Good smoke alarms

smoke alarms arrived in good order, everything was in the package, non damaged and all work fine.

Stephen M
August 18, 2022
Verified Purchase
5304

Simple easy installation. Simple readiut

James D
August 10, 2022
Verified Purchase
Great item

Yes I installed this item at a clients home yesterday easy install and setup

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