Microsoft - HD Digital A/V Adapter for Surface
You've got so much to share, and so many people to share it with - why not share it in high definition? Expand your horizons and your audience. Show off everything you've got on an HD-quality screen.Designed for Surface with Windows RT, this proprietary HD Digital AV Adapter lets you connect your device to any HDMI-compatible display (HDTV, monitor, or projector) and stream movies, play video games, and watch slideshows in high definition.