Senceiver

A senceiver was an experimental device being tested by Starfleet Command in the early 2270s. The senceiver was implanted inside an individual's head and act as a communications medium, allowing text and visual messages to be transmitted into the person's brain.

In 2273, Admiral James T. Kirk was able to receive the visual recording made of a battle between three Klingon battle cruisers and the V'Ger entity.