Ключевые слова: antenna, background, bandwidth, black, channel, communication, communications, connection, device, digital, electric, electronic, emergency, equipment, frequency, hand, handheld, isolated, listening, mobile, mobility, modern, object, orange, outdoor, personal, phone, police, portable, power, radio, receiver, safe, security, system, talk, talkie, technology, telephone, touristic, transceiver, transceivers, transmitter, vhf, walkie, walkie talkie, walkietalkie, wave, white, wireless,