What is it annunciator?

An annunciator is a signaling device used to provide visual or audible alerts for specific events or conditions, often in industrial, commercial, or residential settings. It typically consists of a series of lights or sounds that indicate the status of various systems, such as alarms, machinery, or security systems. Annunciators help operators or users quickly identify issues and take appropriate action. They are commonly used in control panels, fire alarm systems, and other monitoring applications.