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.
1.Support Mini Display Port 1.1a Dual-mode input.
2.The HDMI can support audio output for iMac (Late 2009) and Mac Book Pro (Mid 2010)
3.Support HDMI/DVI/VGA output with the max resolution of 1920x1080p@60Hz, 225MHz/2.25Gbps per channel (6.75Gbps all channel), 12bit per channel (36bit all channel) deep color.
4.Automatic detect the display by plugging and unplugging it.
5.Powered from Mini Display Port source.
Size: 6.0 x 6.0 x 1.5 cm
Cable length: 18cm
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
External Power Supply: No external power needed
Power consumption (Max): 700mW
You should assure that if your Mac has one of the following two kinds of port : mini DP port and Thunderbolt port
1 x Mini Display Port Thunderbolt to DVI VGA HDMI Adapter cable
Connects you to a high definition monitor/projector/LCD using DVI/HDMI/Displayport connector/cable to MacBook/MacBook Pro/MacBook Air with DisplayPort
Support Mini DisplayPort 1.1a input and DVI/HDMI/DisplayPort output.
Support DisplayPort highest video resolution 1920*1200. Support HDMI/DVI highest video resolution 1920*1080p .
Support HDMI/DVI 225MHz/2.25Gbps per channel (6.75Gbps all channel) bandwidth. Support HDMI/DVI 12bit per channel (36bit all channel) deep color.
Powered from Mini DisplayPort source. Cable length: Approx. 15cm.