StarTech.com 6ft Mini DisplayPort to VGA Cable - Active - 1920x1200 - mDP to VGA Adapter Cable for Your Computer Monitor (MDP2VGAMM6B) - Adapter cable - Mini DisplayPort (M) to HD-15 (VGA) (M) - Displayport 1.2/Thunderbolt - 1.8 m - active, 1920 x 1200 (W

The MDP2VGAMM6B 6ft active Mini DisplayPort to VGA converter cable lets you connect your Mini DisplayPort-equipped device (such as a Macbook or any Microsoft Surface Pro devices with mDP) directly to a VGA monitor or projector with no additional adapters or cables required - a cost-effective solution for enabling your Mini DisplayPort computer to work with a VGA monitor or projector.
The adapter cable is compatible with Intel Thunderbolt, when connected directly to a supporting DisplayPort over Thunderbolt I/O port. Plus, because the converter cable supports video resolutions up to 1920x1200 you can convert a DisplayPort video source to VGA without sacrificing video quality.

The MDP2VGAMM6B 6ft active Mini DisplayPort to VGA converter cable lets you connect your Mini DisplayPort-equipped device (such as a Macbook or any Microsoft Surface Pro devices with mDP) directly to a VGA monitor or projector with no additional adapters or cables required - a cost-effective solution for enabling your Mini DisplayPort computer to work with a VGA monitor or projector.