The Kodak Ektachrome P1600 Professional (EPH) is a slide film. It has a nominal speed of ISO 1600.
The EPH is designed for daylight photography. It is equipped with the Kodak T-Grain emulsion.
The Kodak Ektachrome P1600 Professional is designed for push development by two stops. With normal development in E6, it reaches ISO 400.
The color film was discontinued a long time ago. It was available as 35mm film. If you get a roll of the film today, you should overexpose it significantly, as it loses sensitivity over the years.
As an alternative, you could reach for Fujifilm's Superia 1600, which has a sensitivity of ISO 1600, but is a color negative film (C-41) and not a reversal film.
