separate devices. The detector watches for smoke. The speaker tells you what to do about it.
Is It Really a Hotel Intercom for Emergencies?
Calling it a hotel intercom for emergencies is fair, with one honest caveat. A ceiling speaker like this delivers one-way announcements pushed from a central point, usually the front desk or a fire command panel. Somebody speaks there, and it comes out of the speaker over your bed.
A true two-way intercom is a different build. It needs a microphone or a call button so you
