Depending on the service provider, Showtime provides up to sixteen multiplex channels – eight 24-hour multiplex channels, all of which are simulcast in both standard definition and high definition – as well as a video on demand service (Showtime On Demand). Showtime broadcasts its primary and multiplex channels on both Eastern and Pacific Time Zone schedules. The respective coastal feeds of each channel are usually packaged together (though most cable providers only offer the east and west coast feeds of the main Showtime channel), resulting in the difference in local airtimes for a particular movie or program between two geographic locations being three hours at most.