192kHz DAC, supports signal conversion from digital optical coaxial audio to RCA 3.5mm analog audio. Supports 192K / 24bit sampling rate.(Bluetooth decoding format: aptX-LL, aptX-HD, aptX, sbc) Built-in Bluetooth version 5.0 transmitter and receiver, adoting high-tech Bluetooth module, the transmitter mode supports the simultaneous connection of 2 pairs of Bluetooth headsets or Bluetooth speakers; The receiver mode supports the connection of mobile devices such as mobile phones and ipads.