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, (Note: A separate HDMIcable is required, not included)
3.VGA output, connect the VGA devices using a VGA cable.(Note:A separate VGA cable is required, not included)
4.Mini Display Port, connect Mac Book, Mac Book Pro, or Mac Book Air.Not compatible with Thunderbolt ports
Input Signal:Mini Display Port 1.1a,compatible with Thunderbolt ports
Input: Mini Display Port Male 20pin
Connector:DVI Female (24+1) VGA Female 15Pin HDMI Video Amplifier Bandwidth:2.25Gbps/225MHz
Mac Book Air, Mac Book Pro, iMac, and Mac mini with thunderbolt ports since 2011 are all supported.
MB413/MB418/MB420/MB466/MB467/MB470/MB471/MB543/MB604/ MB940/MB985/MB986/MB990/MB991/ MC024/MC026/MC118/MC207/MC226/MC233/MC234/MC413 MC503/MC504/MC505/MC506/MC508/MC509/MC510/MC511/MC516/ MC700/MC721/MC723/MC724/MC725/ MC812/MC813/MC814/MC847/MC950/MC965/MC966/MC968/MC969
Lenovo: ThinkPad X1 X230 T420 W530
How to use:
You can use one of them at a time as your demand, when you want to use the DVI output, you just need to connect the DVI devices with a DVI cable. And when you want to use the HDMI output, you just need to connect the HDMI devices with a HDMI cable. When you want to use the VGA output, you just need yo connect the VGA devices with a VGA cable.
You should assure that if your Mac has one of the following two kinds of port : mini Display port
1 x Mini Display Port Thunderbolt to DVI VGA HDMI Adapter cable