The Mini DisplayPort video Adapter cable lets you connect a standard analog monitor, projector, or LCD that uses a non-mini DP connector or cable to a MacBook, MacBook Pro, or MacBook Air with a Mini DisplayPort.
The new MacBook, MacBook Pro, and MacBook Air each have a Mini DisplayPort that allows you to connect an external display or projector using an adapter.
You can use an external display as your main workspace or extend your desktop.
Notice:
1) The Mini DP out cannot be connected to Display with Thunderbolt 1/2 port.
2) The Mini DP port is for video only, it can not transfer data.
Package:
Mini DP to DP Adapter X2