The Digital 2-way audio converter is a Coaxial / Toslink audio converter. compact and convenient.It accepts S/PDIF audio signal input through either Coaxial cable or Toslink cable.and passes the signal (as is) to both its coaxial and Toslink output ports. Optical to Coaxial Audio:This bi-direction digital audio converter will split the optical signal of your optical source ( Blu-ray Player and Satellite Receiver etc.) into your Speaker or Amplifier. both optical and coax output audio at the same time Coaxialand Optical Aduio Adapter:It will split the Coax signal from your Coaxial source into your Speaker or Amplifier. both optical and coax output audio at the same timeIt simply uses switch on the side of the converter box to choose Optical input or Coaxial input Long-distance Transmission:With built-in amplification chip. This dual-way audio converter can also as a repeater of audio signal and extend the transferring distance. Colour:black Material:Metal Package Contents: 1 x Bi-direction Digital audio converter 1 x USB power cable Only the above package content. other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.