【HDMI 2.1 Audio Extractor】The HDMI 8K audio extractor can extract audio from HDMI signal and transmit it to AV receiver through optical or coaxial or L/R or 3.5mm Cable.Note: Signal light indicates signal transmission, the cable length of HDMI can not exceed 2M, otherwise it will lead to unstable signal and can not transmit the signal. 【EDID Management】8 working modes, you can easily set the desired configuration with the red switch. You can automatically go through the algorithm to match the EDID data of the signal source and the display, or you can use the built-in fixed EDID data to ensure that it can be used properly. The device can control whether the HDMI output has sound or not 【8K Ultra-HD with HDMI 2.1】HDMI 2.1 audio splitter with up to 48G bandwidth supports 8K@60Hz 4K@120Hz RGB / YUV4:4:4 Ultra HD image quality. Optical and coaxial outputs support DTS 5.1. 3.5mm and L/R outputs support PCM2.0 (please note: this audio splitter does not support 7.1 channel audio) 【Simple Connection】The HDMI Audio Converter does not require external power when connected to most source devices. If it does not work properly, use a USB power cable to connect to a USB port on another device or a DC 5V USB power head Note: To ensure stable signal transmission, please use a high-quality HDMI cable 【Widely Compatible & Plug and Play 】Suitable for various HDMI source devices such as Fire TV without dedicated audio output as well as Blu-ray/ DVD/ HD player, cable/satellite box, Amazon Fire TV, PS4,PS5, Xbox, PC/laptop etc.