The digital audio decoder support Dolby Digital AC-3 Dolby Pro Logic, DTS, DAC Converter which converts SPDIF Optical or Coaxial digital PCM audio input to an alog stereo L/R RCA and 3.5mm headphone outputs simultaneously, at the most practical wholesale price right here! This converter sports an ultra-low jitter and high-fidelity design using new receiver & D/A converter chips. This Digital to Analog Converter, DAC Converter has an auto sensing input selection capability with priority given to SPDIF and it disables or disconnects SPDIF input for coaxial input application. It transmits through electromagnetic means without noise. package contents: 1 Digital to analog decoder 1 US standard power supply adapter 1 Optical cable 1 User manualNotice:This item does not support DTS 7.1 and DOLBY 7.1. Before installation,please make sure all devices you wish to connect have been turned off. 1).Connect the audio source device to the converter using appropriate Toslink or Coaxial cables. 2).Connect the AV receivers or Amplifiers to the converter using appropriate R/L cable. 3).Insert the DC side of 5V power supply into the converter and then connect the AC side of the power supply into the wall outlet. 4).Please switch the right channel which you need via press the key "SPDIF/COAXIAL" in the side of the product.