This product with 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:
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.
Input Signal:Mini Display Port 1.1a
Input: Mini Display Port Male 20pin
Output: HDMI Female Type A 19pin
Connector:DVI Female (24+1) VGA Female 15Pin
Vertical Frequency Range:50/60Hz
Video Amplifier Bandwidth:2.25Gbps/225MHz HDMI/DVI/VGA:480i/480p,576p,720p,1080i/1080p
External Power Supply:No external power needed
Power consumption (Max):700mW