SIIG JU-H30412-S1 Mini-DP Video Dock with USB 3.0 LAN Hub expands your laptop's capabilities by adding HDMI and DVI video output ports, three USB 3.0 ports, a Gigabit Ethernet port, and a microphone input and audio output jacks. Connect your laptop to an external monitor, TV, or projector to extend or mirror your display, and use the USB ports to connect peripherals like external hard drives, printers, or a mouse. The Gigabit Ethernet port provides a stable and fast wired internet connection, and the audio jacks allow you to connect speakers or a microphone.