The NCS-C250 Mobile Multi-Switcher is an interoperability solution suited for First Responders that utilize multiple radios such as police, fire and EMS personnel. However, many customers have purchased the unit for dispatch purposes. The unit connects four radios to one microphone and two speakers. Specific features such as crossband repeating of up to 4 radios (VOX operated), Select/Unselect audio control and muting, and PA output make the unit more than a "microphone switch".