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An RCA cable (also known as a composite cable or phono cable) is a type of electrical cable that is commonly used to transmit audio and video signals. It consists of a central conductor, which is typically made of copper, and an insulating layer, along with a shield that prevents interference. The cable typically has three color-coded connectors: red, white, and yellow.

• Red: Right audio channel (for stereo sound).
• White: Left audio channel (for stereo sound).
• Yellow: Video signal (composite video)