Smoke Alarm Ionization 9V Battery | SMI100 | First Alert BRK

Stay alert with the First Alert BRK SMI100 Smoke Alarm, powered via a 9V battery. Featuring ionization sensor technology, it provides fast detection of fast-flame fires—ideal for rooms or locations where flames may spread rapidly. The 9-volt battery allows straightforward installation without wiring, making it well suited for rentals, garages, cabins, or older structures.

Includes test/silence button to check the unit regularly and to temporarily silence benign triggers like occasional smoke from cooking. It emits an 85-decibel alarm for reliable audibility. Lightweight and compact, it’s designed for ceiling or high wall mounting. Battery replacements are needed periodically, and an LED or sound warning indicates low battery status.

Meets UL-217 safety compliance. For the highest safety, combine with CO detection elsewhere or choose a combo unit. Wherever fire risk is greatest, this ionization alarm delivers dependable detection when seconds matter.

Key Features:

• Ionization smoke sensor excels at detecting fast flaming fires
  

• 9V battery powered—installation without wiring needed
  

• Loud 85 dB alarm for strong alerting power
  

• Test/silence button for routine checkups and nuisance silences
  

• Meets UL-217 safety standard
  

Rely on the SMI100 to safeguard your space with fast flame detection and simple installation.

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Returns of new, unused items are accepted for
a refund or exchange within 30 days of purchase. Read our return policy here.