1: DAC651C: supports one ARC input, one optical input, one coaxial input, one Bluetooth 5. 0 input, and one USB 2.0 input. You can randomly switch different input sources through buttons. 2: Supports one 5.1-channel analog audio output. Output through three 3.5mm phone connectors. 3: Audio formats support DTS, DTS-ES, DTS-WAV, AC3, FLACAPE, AAC, WMV, MP3, M4A, etc. 4: Supports Bluetooth V5.0 receiver, supports or AAC () supports 15 meters distance. 5: PC-USB sound card supports WinXP or Win7 or Win8 or Vista or Win10, etc. 6: DAC651C supports -ARC. 7: Supports 5.1ch or 2.0ch output mode selection, FL or FR is valid in 2.0ch output mode. 8: Supports volume adjustment by button. 9: Support DTS or AC3 hardware decoding (5.1 channel separation) and PCM software decoding (2.0ch to virtual 5.1ch) 10: Support USB player and input source selection shutdown memory function Specifications Supported formats:DTS, DTS-ES, DTS-WAV, AC3, FLAC APE, AAC, WMV, MP3, M4A, etc. sampling frequency range:24-192 KHz bit rate range:16-24 Bit Digital input level:0.1-2Volts p-p Analog output level (1kHz 0dB): 2VRMS andN:90dB Dynamic range:105dB Frequency response:20Hz-20KHz Bluetooth working distanc:15m Maximum working current:400mA Power adapter input:AC100V-240V 50HZ or 60HZ,DC-5V or 1A Operating temperature range:-10 to and60C Storage temperature range:-20 to and60C Operating humidity range:10 to 90 percent RH (non-condensing) Storage humidity range:5 to 95 percent RH (non-condensing) Plug Type :EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on. Voltage: AC 220V Colour:As shown Material:plastic Package Contents: 1 x 5.1 Audio Decoder set Only the above package content, other products are not included. Note: Light reflection 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. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.