Portable communications device

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See also: Mobile device

A portable communications device is a hand-held or wearable device. For example, the walkie-talkie is a device that is hand-held when in use, and wearable when not in use. Portable telephones (cellular telephones) are also carried, or worn, on a belt, or in a pocket.

Portable devices have also become usable when worn. For example, most walkie talkies come with a voice operated transmit capability so that they will work hands-free, when used with a wearable microphone. Many telephones such as the Motorola Star Tac also feature an earpiece that allows the phone to be worn and used hands-free. The Star Tac was the first wearable cellular telephone, in the sense that it was the first that could be used while being worn.[citation needed]

Portable computers are computers that can be hand-held, used on a lap, or worn in a pocket, belt, or the like, such as Personal digital assistants (PDAs). PDAs are almost always worn (pocket or belt) when not in use, but some are also usable when worn (e.g. with eyeglass-based displays as well as electric seeing aids such as eyetap devices).

The Portable class of device exists at one end of a continuum:[citation needed]

  • Portable: hand-held or wearable;
  • Mobile: vehicular mounted (e.g. an automobile radiotelephone);
  • Base station or desktop units: building-mounted.

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