http://www.railwaymedia.com/howitworks.cfm

The digEplayer™ 5500 is the world`s first portable Audio/Video-On-Demand (VOD) player. The digEplayer™ can hold more than 50+ full-length movies, sitcoms and 10 hours of music content available on demand for Amtrak passengers. Each unit contains a 40-gigabyte hard drive and utilizes the latest technology for studio quality compression and security. The digital video, digital audio and wireless products are served to you on the screen of digEplayer™ using e.Digital`s proprietary MicroOS™-enabled technology platforms