Q. What is a RCA connector used for?

Connecting devices for coaxial cables. They are present in all legacy audio/video gear and in many modern devices that retain analogue signal capability. When it comes to transmitting a signal to various pieces of electrical equipment RCA connections are among the most used. The plugs on an RCA or composite cable are colored red white and yellow. Primarily it is used to transmit audio and visual signals within a gadget. Connecting devices using jacks allows for the transmission and reception of signals. These RCA ports are often labeled as inputs or outputs. Stereo or two-channel audio signals are transmitted and received using this configuration.