An infrared remote is a device that uses infrared light to send signals to electronic devices, such as TVs, DVD players, and air conditioners. When a button is pressed on the remote, it emits a specific infrared signal that the device recognizes, allowing users to control functions like power, volume, and channel selection from a distance. Infrared remotes typically require a direct line of sight to the device they control, as the infrared signals cannot pass through walls or solid objects. They are commonly powered by batteries and are widely used for their convenience in managing home entertainment systems and other electronic appliances.