RCA is commonly known as lotus socket, also known as AV terminal, also known as AV interface, almost all TV sets, disc machine products have this interface.It is not designed specifically for any kind of interface, which can be used for both audio and video signals, as well as a DVD component (YCrCb) socket, but only three.RCA is usually paired with a white audio interface and a yellow video interface. It is usually connected by RCA (commonly called lotus head), which only needs to connect the standard AV cable with the lotus head to the corresponding interface.