1??Operation: Sound extractor easily switches from any of the four HD multimedia interface inputs to any of the two outputs via remote control or panel buttons. 2??Support HD Multimedia Interface 2.1: HD multimedia interface sound extractor splitter resolutions up to 8K at 60Hz, 4K at 120Hz and supports Vision and HDR. also compatible with lower HD multimedia interface versions. 3??Features: Sound extractor sends 2 channel, 5.1 channel or pathway sound to external sound systems via SPDIF optical or RCA. Sound can be extracted from the HD multimedia interface output and output to optical sound and L or R sound. 4??Sound Independent EDID Support: 8K sound extractor can select 5.1 channel, 2.1 channel and pathway, and supports sound formats such as HD, DTS HD, Atoms, AC3, DTS, LPCM, etc. 5??ARC Function: HD multimedia interface sound extractor has ARC function that allows you to send sound from ARC compatible displays back to the sound extractor for extraction via the optical interface.