"Add extra functionality to your laptop with the JCA351 USB-C to 4K HDMI Ethernet Adapter. This adapter allows you to add an additional 4K HDMI monitor connect to a Gigabit Ethernet network and includes a USB-C Power Delivery port that can be used to charge your laptop when a USB-C power adapter is connected. Display Alt Mode for HDMI supports a resolution up to 4K with Primary Extended and Mirrored display modes. The JCA351 supports upstream charging and Power Delivery 3.0 100W to keep your connected laptop powered up while in use.".