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This 4x2 HDMI KVM matrix switch adopts HDMI 2.0 standard, supporting 4K@60Hz and HDR high-definition video transmission. It allows 4 host computers to share 2 dual monitors and one set of USB 2.0 keyboard and mouse, greatly simplifying desktop wiring and saving equipment cost. Featured with dual independent audio channel and built-in audio extractor, it can separate audio signal from HDMI for independent output to audio devices. The auto scale function automatically adjusts picture resolution to adapt different display screens, no manual setting needed. Driver-free plug and play, perfectly compatible with mainstream systems like Windows, Mac OS and Linux, ideal for office, home entertainment, monitoring room and multi-PC working scenarios.