The CS provides a centralized location for activating, controlling and monitoring all system equipment. The CS also has the ability to broadcast live public address and initiate pre-recorded messages and siren tones. Each CS consists of a PC with Windows-based MassAlert® software and the REACT5000 CCU. The software provides an extremely user-friendly, graphics-based interface to display a detailed map of the county, facility, base or campus with color-coded icons to visually indicate the location and status of the sirens and remote units.