RCA cables are electrical connectors commonly used to transmit audio and video signals. They typically have color-coded plugs: red and white for audio channels and yellow for video. These cables are widely used in home entertainment systems, connecting devices like DVD players, game consoles, and televisions. The design of RCA cables allows for easy plug-and-play connections, making them user-friendly. They are often found in older equipment but can still be used with modern devices through adapters. RCA cables are known for their reliability in delivering quality sound and picture, although they are gradually being replaced by newer technologies like HDMI.