Through the real-shot video, the interface description, connection steps, and actual operation effect of the USB3.0 seamless HDMI KVM switch 41HK3.0 are demonstrated. It is compatible with mainstream operating systems and plug-and-play; it supports the USB port computer sleep wake-up function; it has an HDMI audio separation function, which makes it easy for 4 computers to share a set of speakers, and the audio of other computers can be switched in multi-screen mode. The maximum resolution supports 4K 30Hz, and the resolutions of the four computers can be different. It supports single-screen mode, dual-screen mode, triple-screen mode, quad-screen mode, and picture-in-picture mode. It also supports keyboard and mouse crossing and synchronization functions, and can easily control other computers in multi-screen mode.