1[Multiple Input Support] The digital to analog audio converter supports HD ARC, optical, coaxial input switching, can be easily connected to a wide range of devices. 2[High Sampling Rate] This digital to analog converter supports a 192KHZ audio sampling rate transmission, ensuring hifi sound and excellent audio accuracy. 3[Stereo Headphone Port] The audio converter features a 3.5mm stereo headphone port, compatible with headphones or audio amplifying equipment. 4[5.1 Channel Transmission] The optical coaxial interface supports 5.1 channel transmissions, can be connected to fiber optic interface of power amplifier and speaker. 5[Volume Control] The volume output from the ARC, RCA, and 3.5mm headphone can be easily controlled through your TV for easy operation. 1 x Digital to Analog Audio Converter 1 x USB Cable 1 x User Manual