Optical to coaxial converter will connect Toslink optical output from DVD player, cable or satellite receiver to coaxial digital audio input. Don't buy a new receiver, just change media formats and get full digital signal sound quality. Power supply included. Installation is simple, just connect cables to converter and to device, and then plug everything in and power up. Ideal for home theater, Dolby Digital and DTS. AC/DC adapter (#98011) available.