Universal Security Instruments USI/SM/HWREP Hardwired and 1-Year Battery Backup Smoke Detector with Photoelectric Sensor

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About This Product

Get reliable, whole-home protection with the USI Hardwired Smoke Alarm featuring a replaceable battery backup and Sensing Plus Multi-Criteria Detection. This advanced photoelectric alarm quickly identifies both slow-smoldering and fast-flaming fires for early warning and fast response. It connects with other hardwired alarms in your home, so when one alarm sounds, all interconnected alarms do too—ensuring broader safety coverage.

Equipped with a replaceable 9-volt backup battery, the alarm stays active even during power outages. An end-of-life alert signals when it’s time to replace the unit after 10 years. Designed to minimize false alarms from everyday activities like cooking, it also features a test/silence button for added control. Backed by over five decades of expertise, USI delivers dependable and long-lasting fire safety for your home.

Highlights

• Detects both slow and fast-growing fires with Sensing Plus Multi-Criteria Detection 

• Interconnectable with other alarms—when one sounds, they all do 

• Backup battery ensures continued protection during power loss 

• Minimizes false alarms caused by routine household activities 

• Compliant with UL 217 9th Edition, FHA, HUD, and NFPA standards 

• Simple, hassle-free installation 

• Tamper-resistant design prevents unauthorized removal 

• Protective dust/paint cover shields unit during renovations 

• Loud 85 dB alarm alerts occupants throughout the home 

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