Analog Stereo to Digital Optical Coax Audio Converter Plus AGPtek USB 2.0 All-in-one Card Reader Converts analog L/R signals to digital S/PDIF or TOSLink Both TOSlink and Coax digital outputs may be used simultaneously Digital audio cable length can run up to 15 feet without signal degradation.Supports output sampling rate at 48KHz Provides electromagnetic noise free transmission Supports uncompressed 2-channel LPCM digital audio signal output.