Features: Supports an HDMI-compatible input-, a coaxial 1 optical 1 PC USB an AUX- , and a USB 2.0- input-. You can switch- between different signal sources at will through buttons- or remote control. All signal source(HDMI-compatible/ARC-/COXIAL/OPTICAL/PC-USB/USB) can decode- to 5.1ch output,it is audio decoder system. Supported audio farmat :DTS-HD DTS- DTS-ES DolbyAC3- WAV FLAC APE- HDCD-AAC WMV MP3 M4A etc. The power-off memory function, automatically switch- to the last used signal channel, USB broadcast memory before the power-off. The use of DC12V1A external power adapter power supply, wide voltage- can use DC5-19V power supply Specifications: Item:HD820 Audio Decoder Support Bluetooth-compatible Power Adapter ：DC12V1A HDMI2.0 resolution up to 4Kx2K@60hz,support 3D- Support -5.1ch/2.0ch output mode-,FL-FR active when 2.0ch output mode- Support Button or IR-remote switch- input- source. Supporting IR-adjust VOLOME PS:If you need -5.1CH audio source test, please contact customer service. Plug:UK/ EU/ AU/ US （optional） Material：Aluminum Alloy Package Includes: 1PC HD820 Audio Decoder 1PC Power Adapter 1PC Digital Optical Cable 1PC Digital Coaxial Cable 3PCS RCA-Cable 1PC Remote Control 1PC BlueTooth-compatible Anntena 1PC PC-USB Cable note: Please allow 0-1cm error due to manual measurement. please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!