Headset

Multiple realities
(covers information from several alternate timelines)
Montgomery Scott (alternate reality) at transporter controls

Scotty wearing a headset

Starbase 25 bouncer

A bouncer wearing a headset

A headset was any device worn on the head for interfacing with compatible technologies.

The Ktarian game was also a type of headset device. (TNG: "The Game")

A virtual sensory display was the description Jadzia Dax gave to the headsets worn on Dominion warships. (DS9: "The Ship")

In the alternate reality, Montgomery Scott wore a headset while working the controls of the transporter aboard the USS Enterprise in 2258. (Star Trek)

In 2381, a bouncer on Starbase 25 wore a headset. (LD: "An Embarrassment Of Dooplers")

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