The SVS-14 is a passive, non powered, composite (RCA) and Y/C (S-video), stereo audio switcher.
This unit is not a signal convertor, therefore composite must be routed to composite and Y/C to Y/C.
Extra Sources
When you add the extra item into your home theater system and have no inputs left, this unit lets you add three more.
Passive
Being a passive item, this unit does not require power. Therefore will not tax the user's home power and can be utilized in more locations.