No confusion here--this unit has a voice alarm that announces "Fire! Fire!" in addition to a loud, 85dB beeping when smoke or fire is detected. Sealed-in lithium battery lasts the entire ten-year lifespan of the alarm. It's quick and easy to install
alarm automatically activates when attached to the mounting bracket. Smoke alarm contains photoelectric sensor that may detect visible particles associated with smoldering fires sooner than ionization alarms. Includes a test/hush button that tests alarm circuitry and temporarily silences nuisance alarms. Rapidly flashing LED lights alert users if alarm has sounded since the last time the test/reset button was used. Power Source(s): Lithium-Ion Battery
Mounting: Ceiling
Quantity: 1 each.
Unit of Measure : Each