TOBO This 4K HDMI matrix can connect up to 4 HD signal sources to 2 HDMI Display terminals via optical fiber or stereo headphone output, it allows easy switching or splitting of four HDMI devices into two HD displays.The power supply port is designed to be on the same side as all HDMI ports for easy connection. Solutions suitable for home theater, office, school, meeting room, shopping center, hotel or museum Support multiple video resolutions, including 4K@60Hz, which can make the picture more coherent, smooth and natural, reducing the problem of picture delay (Doesn't support ultra-wide 4K).It is not recommended to use 3440x1440 resolution, which may cause compatibility issues.Support HDMI2.0b, HDCP2.2, HDR 10, RGB:8:8:8, 3D, etc. Support DVI display, 18.5 Gbps data rate transmission,LPCM/DTS 5.1 channel/Dobly Atmos 7.1 (Note: Dobly Atmos 7.1 only supported by OUT A)