The VGA2USB is the only compact dvice capable of capturing VGA images from different sources such as Windows, MAC, UNix, lab, or scientific equipment. The actual specifications can be foudn here VGA2USB Technical Specifications

It comes as an external device so just plugging into your existing USB port means no configuration problems. There is no need to open up your system and configure cards to make this work.This device makes it possible to capture real time images and save them to your hard drive or disk.