upgrade(HDMI ARC) 1: Support one Optical input,one Coaxial input,Bluethooth 5.0 input,HDMI(ARC) input, USB 2.0 input,One PC-USB input. You can switch different signal sources randomy by Button. 2: Audio farmat support FLAC,APE,DTS,AC3,WAV,HDCD,DSD,AAC,WMV,MP3,M4A etc. 3: Support 5.1ch/2.0ch output mode selection,FL/FR active when 2.0ch output mode. 4.Support volume adjustment and switch between previous song and next song 5: Support Button switch input source ,and turn on corresponding LED. 6: Surpport hardware decoding (5.1 channel separation ) and software decoding(2.0ch to 5.1ch) 7: Support USB player and Input source selection power off memory function. 8: The use of DC-5V/1A external power adapter power supply. Plug Type:US Plug,it applies to Canada, India,Mexico, Thailand, the United States, the Philippines,Taiwan and so on. Colour:Black Material:metal Size:108x88x27mm Package Contents: 1 * DA615H Audio Decoder 1 * DC-5V/1A power adapter 1 * Digital optical fiber cable 3 * 3.5mm to 2*RCA cable 1 * BlueTooth Anntena Only the above package content, other pro