Vehicle safety and crime deterrent communication system

摘要: For use in a vehicle having radio equipment including at least microphone and transmitter, apparatus second an adapter for connecting both of said microphones to the transmitter. Switching means are arranged selectively operating microphone, with switching being disposed operation without compromising control during distress situation such as hold-up or like. Circuitry is provided enhancing by providing timing, amplification, noise suppression impedance matching functions.