Converts RCA digital coaxial into Toslink optical signal. It connects Blu-ray, CD/DVD player, satellite/cable TV receive or any device with RCA digital coaxial audio output to sound bar or AV receiver with Toslink audio input port. This S/PDIF digital audio format converter supports PCM, Dolby and DTS multi-channel audio. Includes power adaptor. Note: If you need to convert Toslink optical into RCA digital coax, use FCTK-RCA. This does not convert ANALOG RCA stereo audio into S/PDIF Toslink. (Connectors: RCA Female to Toslink Female)