Profile: Roanwell Corporation. specializes in designing & manufacturing audio products. Our products include acoustic headsets, handsets, microphones, earphones cords, cables & accessories for military and commercial applications. The type 200 (RN-1C) is a carbon, noise-cancelling microphone designed to fit many types of boom-mounted microphones and all 52-type telephone operator headsets (N-1 replacement). This microphone cancels a minimum of 16dB of background noise and is installed in seconds. The aircraft handset is designed to link the flight deck with the passenger cabin providing clear communications throughout the entire flight. This handset is equipped with a noise-cancelling microphone with hum rejection, available in dynamic or electret versions.