S/PDIF digital audio is today's standard for home theater surround sound. However there are two distinct formats (Coaxial and TOSLINK), and your a/v components may feature dissimilar connection types. The 40429 Digital Audio Adapter will help ensure system compatibility by accepting Coaxial or TOSLINK and delivering a dual output in both formats. From a TOSLINK input, the unit will convert to Coaxial and also extend TOSLINK up to another 5 meters. Likewise, from a Coaxial input, the unit will provide both Coaxial and TOSLINK outputs. Our digital adapter is the ideal solution for converting the digital audio output from your DVD player, cable box, or satellite receiver to the input your sound system requires.