HDMI2.0compatible(x4)+ARC+Coaxial+Optical+PC-USB+AUX+USB 2.0+Bluetooth V5.0 input.  HDMI compatible+Coxial+Optical+5.1ch output  All signal source(HDMI compatible/ARC/COXIAL/OPTICAL/PC-USB/AUX/USB)can decode to 5.1ch output.  All signal source(HDMI compatible/ARC/COXIAL/OPTICAL/PC-USB/AUX/USB)can convert to COXIAL/OPTICAL output.  HDMI compatible resolution up to 4Kx2K@30hz,support 3D  Supported audio farmat :FLAC/APE/DTS/DTS-ES/DTS-HD/AC3/WAV/HDCD/AAC/WMV/MP3/M4A etc.  Support 5.1/5.0/4.1/4.0/2.1/2.0ch output mode,FL/FR active when 2.0ch  Support Button switch input source, U disk play up and down ,play / Pause,turn on corresponding LED or display on LCD.  Support IRremote control operation.  U disk supports folder and file browsing and playing, displaying song title. Support optical and coaxial output.The capacity is 128G/FAT32 format.  The power-off memory function, automatically switch to the last used signal channel, USB broadcast memory before the power-off.  Surpport hardware decoding (5.1 channel separation ) and software decoding(2.0chto 5.1ch)  PS: ARC need to use 19+1 core HDMI cable+TV support ARC function  Plug Type:US Plug,it applies to Canada, India,Mexico, Thailand, the United States, the Philippines,Taiwan and so on. / Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on  Colour: black  Material: metal  Size: 184 x 97 x 53mm  Voltage: AC100-240V