ARC audio extractor can return the sound of a TV that supports ARC function to the fiber, coaxial, 3.5mm headphone compatible withjack of the adapter through the compatible withHDMI-compatible/ARC interface. DAC converter supports conversion of optical or coaxial digital audio signals into stereo analog signals and can be output at the same time. The ARC adapter perfectly solves the problem that the TV without audio output interface cannot be connected to the audio system. DAC converter compatible withselector is very suitable compatible withhome theaters, teaching, training structures, meeting rooms, home appliance stores and other places. ARC audio extractor supports compatible withHDMI-compatible, ARC, optical fiber, coaxial input switching function, supports optical fiber, coaxial, compatible withRCA stereo, 3.5mm stereo earphone output at the same time. Specification: Size: show as pictures. Material: aluminum alloy. Color: show as pictures. Note: There might be a bit color distortion due to different computer resolutions. There might be a slight error due to different hand measurement. Package Included: 1 x DAC converter. 1 x USB power supply. 1 x English manual.