4x1 HDMI SWITCH WITH AUDIO EXTRACTOR: HDMI Switch box allows four HDMI sources to one HDTV/monitor/projector. solving your multiple HDMI devices issue. Simultaneously, it can also extract the audio embedded in HDMI source and converts it to 2 channel analog stereo output or 5.1 channel audio outputs via optical SPDIF/coaxial/ 3.5mm jack. Ideal solution for home theater, office, school,shopping center or hotel. 4K@60HZ ULTRA HD RESOLUTION: HDMI switch with audio out support max HDCP 2.2, HDMI2.0b, HDR 10, RGB8:8:8, Deep Color to 36bit, 4K@60Hz, also back compatible with 4K@30Hz, FULL HD 1080P@120Hz. Max Bandwidth of 18.5Gbps. which offers lossless high definition amazing video and audio quality.