Coaxial RCA Jack(Input) Digital Audio to Optical Toslink Jack(Output) Converter Digital Audio Signal Converter device converts Coaxial RCA Plug (IN) to Optical TosLink Plug (OUT). This converter will transform your digital RCA Coaxial (S/PDIF) audio signal to a Digital Toslink Optical signal. It will allow you to connect the coaxial digital audio output from your DVD, cable or satellite receiver to a Toslink digital optical input. The compact size of this unit lets you place it almost anywhere. Installation of this device is simplified to the maximum – just plug in your two cables, plug in the power supply and you are good to go! Please note that this device does not convert analog mono RCA to digital TosLink.