Overview: This HDMI audio extractor has 3 HDMI input, one HDMI output, one optical slink output and stereo output with RCA cable, avoid frequently plugging/unplugging the HDMI cables; widely used in home entertainment, meeting rooms, schools etc. Feature: 1. 3 port HDMI switch: support deep color 30bit, 36bit, 48bit per Pixel. 3. 5mm audio output supports 2Ch PCM stereo audio only. Slink output supports 2Ch PCM, 5. 1Ch Dolby digital, DTS audiogram 2. This HDMI switch input resolution: up to 4K@30Hz, 1080p, 3D, supports video EDID pass through, audio EDID settings: 2Ch and 5. 1Ch, our HDMI switcher not support HDCP 2. 2 3. Three HDMI input converter to one HDMI displays mode)+ optical slink output. 1Ch mode) or stereo audio outputs mode) come with RCA cable; automatic, manual or remote switching 4. Widely compatible: HDMI audio converter suitable for various HDMI source devices like Roku or chrome cast without dedicated audio output note: 1. If your source device is 4k@60hz(hdmi 2. 0 and HDCP2. 2), Please set up the resolution to 4K@30Hz or 1080p@60Hz to use this 3 ports HDMI switch. how to set the resolution to fit our HDMI switch: a). connect your "4K@60Hz HDMI 2. 0 input device" Directly to the TV B). then go to "setting-picture-resolution(choose "auto")-then go to "HDMI color format"(choose "auto") 2. Not compatible with Netflix and YouTube video s. 3. When select to 5. 1 channel mode, The SPDIF out Will output 5. 1 channel audio depends on whether the input source contains 5. 1 channel audio: a). if it contains, SPDIF out interface will output 5. 1 channel audio signal while stereo out interface output nothing. B). If it not contains, SPDIF out and audio out interface are all output 2 channel audio signal. Can not be used with other converter, such as HDMI to DVI converter. Package contents: 1 x HDMI audio extractor> 1 x Micro USB cables> 1 x 3. 5mm to 2