HDMI (High‑Definition Multimedia Interface) is used to transmit high‑definition audio‑video signals and realize lossless synchronous audio‑video output between devices. It is widely used in home entertainment, office meetings, video gaming, commercial display and other scenarios. Signal sources such as laptops, desktops, set‑top boxes and game consoles can connect to monitors, TVs, projectors and video walls via HDMI cables. It delivers 1080P, 2K, 4K, 8K high‑definition video and stereo audio, supporting video conferencing, media playback, screen mirroring, display extension and multi‑screen office work.