S/PDIF Adapter,3.5mm MONO Plug to RCA Mono Jack Gold Plated This adapter is used to connect 3.5mm S/PDIF phono jack on a computer sound card or portable device to the Digital Coax input on a Reciever or Surround Sound Processor via a standard RCA cable 1 x 3.5mm mono male jack 1 x RCA female plug Gold Plated