Allows you to connect four TosLink sources to one TosLink input! This compact switch allows you to connect four digital optical Toslink sources to a single optical TosLink (SPDIF) input on your HD TV, AV amplifier, Hi-Fi or home cinema system. Ideal for use with PS3, CD/DVD Player, set top box, PC etc. and saves on wear and tear of constant plugging and unplugging of cables.