Ключевые слова: antenna, background, bandwidth, broadcast, button, channel, closeup, communications, connection, device, distance, emergency, equipment, ether, frequency, help, isolated, message, microphone, mobile, mobility, negotiations, object, personal, portable, ptt, radio, radiowave, receiver, rescue, safety, scanner, security, set, signal, sos, speak, talkie, talking, technology, transceiver, transmit, transmitter, uhf, voice, walkie, walkie talkie, walky, wave, wireless,