Mini DP Display Port to VGA Adapter
Mini DP Displayport to DVI VGA HDMI Adapter 3 in1 for Apple MacBook Air Pro iMac
Three output ports, you can choose one of them to use at same time.
as you demand, the functions of the port as followings:
1.DVI output, connect the DVI devices using a DVI cable.
2.HDMI output, connect the HDMI devices using a HDMI cable.
3.VGA output, connect the VGA devices using a VGA cable.
4.Mini Display Port, connect Mac Book, Mac Book Pro, or Mac Book Air.