Product Advantage:1. Digital to Analog Audio Decoder, It Converts Coaxial or Toslink (Optical,S/PDIF) Digital Audio Signal to 5.1CH or 2.0CH analog and 3.5mm Jack Audio,;2. Supports volume control, This DAC Converter has a volume control knob, still need connected to AV amplifier or receiver via standard RCA cables to enjoy the shock effect of DTS or Dolby AC-3.3. Support Dolby AC3 /DTS/LPCM / PCM / RAW Audio Format, It can convert Dolby AC-3 / DTS 5.1CH digital audio to 5.1CH and 2.0CH analog audio output.4. It Also Supports 24-bit SPDIF Incoming Bit Stream on Left and Right Channels.5.Two Audio Mode Settings, Pass(5.1CH) and 2.0CH Audio Mode Options:Switch to "PASS(5.1CH)" position: To enjoy 5.1CH soud surround Atmos,you still need set the output of your device or audio source to 5.1CH mode.Switch to 2.0CH:Convert 5.1CH to 2.0CHAttention for 5.1CH Operation : Please make sure that your audio source has Dolby or DTS 5.1CH format,it means there should be a "Dolby" or "DTS" mark on your Disc?but not Dolby 2.0 output;Please make sure that your audio device support "Dolby" or "DTS",it means there should be a "Dolby" or "DTS" mark on your DiscThe output volume of 6 channels maybe different,that is Dolby, 6 channels for 6 sounds base on your RAW audio source,you could adjust each channel's volume by your AV receiver;Specification?Support audio format:MP3,AC3,DTS,WAV,WMA,AAC,ALAC,FLAC,APE,OGG,M4ASignal Noise Ratio?120dbStereo Isolation?80db?1KHZ?Sampling Rate?32~192 KHzBit Rate?16~24 BitShell Dimension?138.2 x 97.5 x 21.2mmWeight?238gPower Adapter?5V/1APackage Contents:1 x 192KHz DAC Decoder1 x User Manual1 x USB Power Cable