Designed for those who want a one-stop upgrade for your Thunderbolt 3, Thunderbolt 4, USB4, USB 3.0, or USB-C laptop. The Plugable Universal Laptop Docking Station for Windows and Mac (UD-3900) allows you to add dual monitors, and connect your peripherals, all through a single cable back to your laptop. Quickly come and go from your desk with ease. By connecting one cable to your laptop, you gain 11 extra ports of connectivity, making it easier to do more work in less time. Power users with dual monitors: The UD-3900 is the dock you need to maximize your productivity and your workspace. Great for business uses such as email, web applications, Google Docs, Microsoft Office, and more. Featuring a vertical design, you can easily slip this dock between your monitors and save valuable desk space. Conveniently access the front USB and audio ports for those devices you plug and unplug everyday. Note: The UD-3900 will not charge your laptop and you will need your external charger to provide power to the system. The UD-3900 has one HDMI port and one DVI port and we include both a DVI to VGA adapter and a DVI to HDMI adapter if needed (not compatible with DisplayPort displays).