Mirror two identical DVI-D displays from a single DVI-D video source 1ft DVI Splitter Cable / 30cm DVI-D Splitter / Y Cable / 1 ft DVI-D to 2x DVI-D Digital Video Splitter Cable M/F Output one DVI digital video signal to two DVI-D displays simultaneously Offers 12' in cable length and removes strain from the DVI-D connectors and reduces the potential of blocking other available ports