AV receivers typically include multiple input and output ports, such as HDMI, optical, and analog, to accommodate a variety of audio and video sources and devices. They also include built-in audio and video processing capabilities, such as surround sound decoding, audio equalization, and video upscaling, to enhance the quality of the audio and video signals.

In addition to processing and amplifying audio and video signals, many AV receivers also include features such as wireless connectivity, support for streaming music services, and integration with smart home systems.

When choosing an AV receiver, it is important to consider the number and type of input and output ports, the power output, the number and type of audio and video processing features, and the overall compatibility with your home theater system and devices.