Mini DP DisplayPort 1. 2 Thunderbolt TO DVI VGA HDMI 4K*2K adapter 3 in1 for Apple MacBook Air Pro iMac three output ports, you can choose one of them to use at same time. Note: only supports 1 Display output at a 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. A separate HDMI/DVI/VGA cable is required, Not included VGA output, connect the VGA devices using a VGA cable. 4. Mini Display port, connect Mac book, Mac book Pro, or Mac book air