The mstmdp123dp mini displayport 12 to displayport mst hub lets you connect up to three displayport monitorsprojectors to a single mini displayport 12 output on your ultrabook laptop or desktop computer extend your display the hub splits a mini displayport 12 output into three separate displayport signals enabling your computer for high quality multi monitor applications such as a video wall extending your desktop or mirroring your primary display to additional monitors or projecto