A USB Infrared Adapter is a device that allows your computer to communicate with infrared (IR) devices, such as remote controls, sensors, or other IR peripherals, via a USB port. This kind of adapter typically provides a wireless communication interface between the computer and IR devices. It is commonly used for controlling devices like TVs, air conditioners, and other electronics, or for transferring data between a computer and mobile devices (especially older mobile devices) that use infrared communication.

To use a USB Infrared Adapter on a Windows computer, you need the appropriate driver that facilitates the connection between the USB port and the IR hardware, enabling your computer to send and receive data over infrared.