Support HDMI(x2)+ARC+Coaxial+ Optical+PC-USB+AUX+USB 2.0+Bluetooth V5.0 input. Support HDMI+Coxial+Optical+5.1ch outputAll signal source(HDMI/ARC/COXIAL/OPTICAL/PC-USB/AUX/USB) can decode to 5.1ch output.All signal source(HDMI/ARC/COXIAL/OPTICAL/PC-USB/USB) can convert to COXIAL/OPTICAL output( AUX can't).HDMI resolution up to 4Kx2K@30hz,support 3DSupported 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 IR remote 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(2.0ch to 5.1ch)PC USB 5.1 sound card driver and installation instructionshttp://www.aoyint.com/2019/09/29/hd815_920pcusbdriver/If you need an English menu, please download the firmware to the U disk to upgrade.aoyint.com/software/HD920/HD920English_menu.rarPS: ARC need to use 19-core HDMI cablePlug 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 onColour: BlackMaterial: metal + plasticSize: 184 x 97 x 53mmPackage Contents:1 x HD920B 5.1CH Audio Decoder setOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.