The 1x4 HDMI splitter allows set-top boxes, DVD players, D-VHS players and other HDTV devices with HDMI output to be connected to four or more HDTV displays. Gefen"s 1x4 HDMI splitter is a distribution hub that sends the same video output to four or more HDTV digital displays by itself and many more displays if multiple splitters are connected together. The HDMI splitter is connected using a HDMI cable from the HDMI source to the HDMI splitter input. There are four HDMI outputs. HDMI Output #1 is the Primary output, where the characteristics and capabilities of the Primary Display are retrieved and then used to drive all the other displays. Note: This HDMI product supports BOTH Audio and Video signals. All displays that cannot show the same video resolution(s) as the Primary Display connected to Output #1 may fail to show a picture. Secondary displays follow the Primary by sharing the resolution and capability information (EDID) obtained from the Primary Display. Package Includes: 1x4 HDMI splitter, One 5v Power Supply, One 6ft cable, User"s Manual.