Features The four-way HD Audio and video source choose USB interface to realize four free switch; Support video resolution max up to 4Kx2K@30Hz; Compliance with HD1.4 standard; Adaptive EDID, able to adapt to a variety of complex application environment; Hot key switch, convenient and quick (Scroll Lock + Scroll Lock+ 1,2,3,4) High compatibility, can auto-match source and display device; Built-in automatic adjustment system, make the image smooth, clear and stable; Built-in ESD protection system; Simple to install, plug and play;