SA305CN Ionization Smoke Alarm with Long-Life Lithium Battery


SA305CN Ionization Smoke Alarm with Long-Life Lithium Battery



The First Alert SA305 Ionization Smoke Alarm features a long-life lithium battery making it an ideal choice for essential home smoke detection. This smoke detector uses ionization smoke-sensing technology with an enhanced smoke-gathering design that is ideal for detecting smoke from flaming fires. A convenient single-button operation lets you silence false alarms and test the fire alarm to ensure it is working.

  • Smoke alarm detects smoke from flaming fires
  • Ionization smoke-sensing technology with enhanced smoke-gathering design
  • Loud 85-decibel alarm is designed to be heard easily
  • Side-load, tamper resistant battery compartment
  • Smoke detector features single test/silence button for simple operation
Product Overview


Ionization Sensor Detects Smoke from Flaming Fires

The First Alert SA305 Smoke Alarm with Lithium Battery features ionization smoke-sensing technology, ideal for fast-flaming fires. The 85-decibel alarm is designed to be loud and easily heard in the event of a fire emergency.

Easy-to-Use Design

This battery-operated smoke detector utilizes a single button for simple operation. Press the button on the face of the fire alarm to silence and test the alarm. A blinking power light informs you the smoke alarm is operational, while a low battery-alert lets you know when it is time to change the battery.

Tamper-Resistant Battery Operation

A single 9-volt, long-life lithium battery powers the First Alert SA305 Ionization Smoke Alarm. This fire detector is built with a side-load battery drawer that slides open for easy battery replacement. The alarm features an optional pin to lock the battery and unit in place for tamper resistance, making it so neither the battery nor the smoke detector can be removed without the proper tools. This ionization smoke and fire detector can be easily installed on the wall or ceiling, and it is suitable for use in mobile homes and RVs.

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Product Manuals

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User's Manual for SA300, SA303 & SA305 Smoke Alarms (English, Spanish)

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More Information on Ionization vs. Photoelectric Smoke Alarms