With NÖRDIC SGM-156 HDMI 4Ports switch, you can share two screens with four HDMI video sources. The switch has four independent entrances which each support 4K resolution and 5.1 audio sounds. The switch is backward compatible with high resolution 1080p, you can ensure that all video sources look good in your digital sign application.In addition, the sound that is embedded in HDMI can be extracted via Toslink or COAXIAL and the switch can return the sounds to AV receivers with the ARC function (AUDIO RETURN Channel). The switch has edid function to be able to choose the most appropriate set up. One can switch between different HDMI sources with remote control or manuel button. The switch is powered by the supplied DC5V AC adapter. The switch has manual control and remotely controller it is possible for the last activated video source to display automatic support for different audio output simultaneously: Stereo, Toslink, Coaxial and 3.5mm Stere resolution for resolution up to 4K @ 60Hz support for 600 MHz 6 Gbps per channel 18 GBPS All channels bandwidth support For 12 bit per channel (36 bit all channels) deep color support for HDCP2.2 support for HDR10 support for uncompressed sound as LPCM 7.1 support for compressed sound as DTS, Dolby Digital, DTS HD Master Audio and Dolby TrueHD, Dolby Atmossupport for Audio Return Channel Arc. Content: Switch, Remote Control, DC 5V Power and Manual