Abstract: A driver-operated electronic push-button control system is provided for installation and use within a mobile radio vehicle, which control system is capable of operating and controlling a plurality of radio transmitter/receiver communication units, and of operating and controlling additional electronic and electrical equipment commonly required in emergency type vehicles. Electronic circuitry is provided, in the form of a combiner unit, to interface the radio transmitter/receiver communication units and the other electronic and electrical equipment, with the control system. Both the combiner unit and radio transmitter/receiver units may conveniently be located in the trunk of the vehicle. For emergency type vehicles, special additional electronic circuitry is included within the combiner unit that provides an electronic siren, a public address system, an outside speaker system, and electronic switching for the control of electronic lights in the roof-mounted light bar.