It used a twin-track 8.75 mm film onto which video signals were transferred by electron beam recording, two monochrome tracks in the same direction of travel.
The images stored on an EVR film were visible frames much like motion picture film, and were read by a flying-spot scanner inside an EVR player to be converted to a video signal to be sent to a television set.
As a professional medium, the format offered extremely high quality.
Once the race ended, the player(s) who bet on the winning horse would receive a payout.
[5][6] EVR Race was Japan's highest-grossing medal game for three years in a row, from 1976 to 1978.