The V-9925A Loud Warble Ringer Horn is a self-contained 5W electronic ringer that sends tones over an organization’s paging system to alert individuals of shift changes, breaks or important announcements. The Loud Ringer Horn can be used for interior or exterior applications and are ideal for machine shops, outdoor work yards, factories and warehouses. The V-9925A broadcasts a loud warble as long as an input signal is present and has the ability for night rings for after normal business hours.