Infrared is located in the Components category in System Information. It contains information about infrared (abbreviated as IR) devices and ports on your system. These devices may not exist on all machines.
Infrared device can be a computer, or a computer peripheral such as a printer, that can communicate using infrared light that is beyond red in the color spectrum. While the light is not visible to the human eye, infrared transmitters and receivers can send and receive infrared signals.
Infrared port is an optical port on a computer that enables communication with other computers or devices by using infrared light, without cables. Infrared ports can be found on some portable computers, printers, and cameras.