Gefen"s DVI Splitter is a stackable distribution hub that sends the same DVI graphics source to two or more DVI digital displays (flat panels or projectors). It is a flexible solution that accommodates multiple digital video displays, and when multiple DVI Splitters are connected together, they can be used to create a 1:4 or a 1:6 distribution (one DVI input / multiple DVI display outputs). When multiple units are stacked you can switch between all the inputs into all the outputs with the RMT-16 remote. The configuration of stacking multiple units must be done by Gefen professionals. The DVI Splitter is connected with a DVI (male to male) cable from the DVI graphic source to the DVI Splitter input. There are two DVI outputs in each module. DVI output one is the primary connection and is used for the main display. DVI output two follows the main display. The DVI Splitter is using a unique DVI Bus? technology to connect multiple splitters without sacrificing a DVI output connection. Any connected display 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. The DVI Splitter will only output a DVI-D (DVI digital) signal. If you"re using a DVI-I cable, it will ONLY pass the digital signal. Using a DVI-I to VGA adapter off of any output will not pass an analog signal. A DVI-D to VGA Conversion Box is required to convert to an analog signal. Package Includes: DVI splitter, 6ft DVI cable M-M, 5v Power Supply.