The Diamond MSD3900 USB 3.0 to HDMI VGA mini Ultra Docking station allows easy plug and play installation for multiple displays monitors. Enhance your laptops visual experience by adding 2, 3 or up to 6 displays in minutes. Each Display requires an additional MDS3900 adapter, each adapter supports dual head video output, support for HDMI and DVI VGA simultaneously. Gigabit Ethernet support, upgrade or add Ethernet wired connectivity to you laptop, Macbook, and Ultradock with one single USB connection.