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This multifunctional 4-port HDMI2.0 switch combines source switching, independent audio extraction and ARC reverse audio transmission in one unit, compliant with HDMI2.0 and HDCP2.2 standards. Users can freely switch four connected devices to a single TV, monitor or projector, while separating embedded audio via optical fiber or 3.5mm stereo port to match different audio systems. ARC function realizes two-way audio transmission between TV and sound equipment. It fully supports mainstream video specifications including 4K@60Hz, high-frame 1080P@120Hz and 3D content. No complicated software installation required, perfectly suited for multi-console gaming station and family home cinema layout.