Product Instructions: This 192Khz DAC with bluetooth 5.0 audio adapter has multi ports.It can support 3 devices input via cables by SPDIF,Coaxial,3.5mm Jack. It also support wireless bluetooth receiver or transmitter functions. Product Interfaces: Input: SPDIF(toslink, optical),Coaxial,3.5mm Aux Output: 2 RCA,3.5mm Aux Antenna:Bluetooth Receiver and Bluetooth Transmitter Product Functions: 1. Digital to Analog Audio Converter(DAC): convert digital signals from SPDIF(Toslink/Optical fiber) or Coaxial to 2 RCA (L+R) and 3.5mm aux stereo analog. 2. 3.5mm Stereo Aux to 2 RCA (L+R) and 3.5mm: This converter also support 3.5mm jack to L+R 2RCA; 3.Bluetooth Receiver: In receiver mode,it can wireless receive bluetooth audio signals from your smartphone,laptop,PC or other bluetooth devices and the transfer the signals to your active speakers or amplifier via its output ports and cables.eg, share music or FM radio from your smartphone to your home stereo audio devices. 4.Bluetooth Transmitter: In transmitter mode,it can send the audio signals from your HDTV,Xbox,Sky TV Box,Game Playstation PS2,PS3,PS4 to your bluetooth headphone or headset wireless. With above multy functions, it is a perfect supplement device to your current audio systems.It is widely used at home stereo, training room,fitness centre,gym music or movie sound signal transmission.and also be a good gift to your friends or families. Package including: 1xDAC with Bluetooth Receiver and Transmitter 1xOptical Cable 1x3.5mm to 2 RCA Cinch cable, 1xUSB Power Cable, 1xUser Manual;