HDMI eARC Audio Extractor,2/4 port Bi direction Extractor 4K 60Hz Toslink SPDIF COAXIAL 5.1CH Switch & Splitter Converter (4 HDMI)

A)The HDMI 2.1 audio extractor supports up to 5.1Ch over its Toslink / coaxial digital audio port while up to 7.1ch over its HDMI audio Port.To out 5.1Ch, the video source must be native 5.1ch like dolby,dts and your AV receiver is capable of decoding such audio format. B)Features:Support HDCP2.2,HDR10；Support 4K@60Hz；Support signal switching, audio return signal distribution;Support 3D video format (Only when copy TV EDID has);Support ARC/eARC function(power amplifier, sound bar etc.);Support eARC splitter function, can return eARC/ARC signal to 2/4 amplifiers or Sound bar. C)To out 7.1ch over the hdmi audio port,the video source must be of 7.1Ch and your av receivers must be capable of supporting it.HDMI 2.1 video transmission has very high requirements on cables connected,pls use ATC certified ultra high speed HDMI cables only. D)The Audio splitter is not recommended to use with Monitor and projector with HDMI and VGA port.Under a few cases, there will wont be audio over all audio ports. This is a handshake(EDID) problem with these devices. The HDMI port of these monitors and projectors are very likely based on VGA Standards in spite of the phisical HDMI port.