This converter adapter has three output ports, and you can choose one of them to use at a time as you demand, the functions of the port as followings:dvi output, connect the dvi devices using a dvi cable.hdmi output, connect the hdmi devices using a hdmi cable.vga output, connect the vga devices using a vga cable.mini display port, connect mac book, mac book pro, or mac book air.support mini display port 1.1a dual-mode input.the hdmi can support audio output for imac (late 2009) and mac book pro (mid 2010)support hdmi/dvi/vga output with the max resolution of 1920x1080p60hz, 225mhz/2.25gbps per channel (6.75gbps all channel), 12bit per channel (36bit all channel) deep color.automatic detect the display by plugging and unplugging it.powered from mini display port sourc