The SPDIFCOAXTOS Two way Digital Coax to Toslink Audio Converter Repeater lets you extend and convert digital coax to Toslink audio, or Toslink to digital coax. This small form-factor coax toslink converter is an easy to use solution allows you to select the input signal you want to convert or extend, and simultaneously outputs both digital coaxial and Toslink audio signals without downgrading the audio signal, and provides an output signal that matches the quality of input audio, supporting 2 to 5.1 channel audio.