An IR remote control is a device that uses infrared light to send signals to electronic devices, such as televisions, DVD players, and sound systems. When a button is pressed on the remote, it emits a specific pattern of infrared light that the device recognizes and responds to, allowing users to control functions like power, volume, and channel selection from a distance. These remotes typically require a direct line of sight to the device they control, as the infrared signals cannot pass through walls or solid objects. Most IR remote controls operate within a range of about 30 feet, making them convenient for home entertainment systems.