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.