Etekcity Analog to Digital Audio Converter with Newest Noise-free Audio Conversion Technology &ndash; Convert RCA L/R 3.5mm Stereo Audio to Optical S/PDIF Toslink & Digital Coaxial for Stereo, TV, Sound System, Receiver, DVD Player, Soundbar, and more 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 Compact and easy to install