Monoprice 102946 3X1 Optical Audio TosLink Bi-Directional Manual Switch This bi-directional Toslink (digital optical audio) switch serves as either a 3x1 switch or a 1x3 switch As a 3x1 device the switch allows you to select one of up to three input devices to direct to the single output As a 1x3 device the switch works in the opposite direction allowing you to direct a single input to one of up to three output devices This switch provides full optical clarity and will not degrade the optical signal in any way