It's for streaming media from a DLNA complaint server to the TV, such as music, pictures video.
If you have a windows PC, you already have a built in DLNA server, Windows Media Playe. If you are on a Mac, TwonkyVision will work.
If you have a windows PC, you already have a built in DLNA server, Windows Media Playe. If you are on a Mac, TwonkyVision will work.