This Belkin PureAV 3-port HDMI Interface Video Switch allows you to connect to and switch among three high-definition, digital-video source devices through only one high-definition multimedia interface (HDMI) or digital visual interface (DVI) connection on your high-definition television (HDTV). Its quick adoption has made HDMI one of the most common audio video connections available. It is used on high-definition components, such as HDTV's, up-converting DVD players, HD cable/satellite boxes, enter ainment computers, and the newly released Blu-ray and HD-DVD players.