Easily connect the 3.5 headphone jack to digital audio/amplifierDouble noise reduction, no current sound, stronger anti-interferenceBuilt-in professional audio op-amp chip to ensure high-quality sound quality transportationOptical fiber and co-frequency audio shaft output at the same timeNo driver required, plug and playConverts RCA or AUX analog stereo audio signal to Digital Coaxial audio and Toslink Spdif Optical digital audio simultaneously. Note: It's not a Digital to Analog audio converter.color:Black greyMaterial:MetalPackage Contents:1 x converter1 x optical cable1 x USB cableOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.