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Device for transmitting and receiving messages over long distances
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System for transmitting voices over a distance using wire or radio, by converting acoustic vibrations to electrical signals.
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The transmission and reception of electromagnetic waves of radio frequency, especially those carrying sound messages.
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System for the transmission of images and sounds at a distance by means of Hertzian waves.
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Electronic device for storing and processing data, typically in binary form, according to instructions given to it in a variable program.
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Portable electronic device larger than a smartphone or PDA
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Telephone with access to a cellular radio system so it can be used over a wide area, without a physical connection to a network.
