Portable, voice-controlled intercom system for two headsets, specially designed for use with ICOM IC-A24E and IC-A6E handheld radios with standard aviation headsets. Controls for squelch and volume, socket for external P.T.T. button, an external P.T.T. button with cable and Velcro fastener is included. Power supply via internal 9 V block battery (operating time approx. 24 hours). Dimensions 5.7 x 3.5 x 7 cm.