20 ft 2.2mm thick TOSLink to TOSLink fiber optic Digital Audio Cable.

TOSLink provides a digital optical connection between audio devices.   Because the information is converted into light impulses that are sent over the fiber optic cable, the signal is immune from RF or magnetic interference.

TOSLink is used on high-end stereo equipment and often seen on MiniDisc recorders, DVD players, Sound Cards, HDTV's.