【HDMI to HDMI and Audio Extractor】Input HDMI,output HDMI and audio signal with digital SPDIF,Coaxial and analog 3.5mm R/L ports.HDMI support 4K/3D. 【Video and Audio Splitter and Synchronous】By using this,HDMI input port connected to your DVD,PC,game console,TV Box,HDMI output could be connected to your TV,Project,or monitor.At the same time,audio separated by SPDIF,Coaxial,3.5mm,and connected to your audio devices such as soundbar. 【HDMI ARC Function】One switch to turn on audio return channel,you could connect it to your TV's HDMI ARC port, the audio will be returned from your TV and output by SPDIF and coaxial,which could be connected to your audio system; 【EDID & CEC Function】With EDID,one button to switch 2CH and 5.1ch,and audio volume can be controlled by the TV's remote controller. 【Mini Size】Metal case,small size,easy to use.