HDMI or High-Definition Multimedia Interface is an essential connector for transferring high-quality digital video and audio from one device to another. It is a popular video interface used in projectors, TVs, and monitors as a video input or HDMI-in. For HDMI-out, it is frequently available on a laptop, desktop, or game console.
The Dell Latitude 5521 comes with an HDMI port version 2.0, supporting video output up to 4K at 60Hz. The port is on the right side of the device.