Etekcity Analog to Digital Audio Converter - Convert RCA L/R Audio to Optical S/PDIF Toslink & Digital Coaxial, great for Stereo, TV, Sound System, Receiver, DVD Player, Soundbar, etc Converts analog audio input to digital optical or coaxial output Electromagnetic noise-free transmission Uncompressed 2-channel LPCM digital audio output Simultaneous optical and coaxial output Easy to install and simple to operate