The IrDA v30 Fast Infrared Port is a Windows driver for devices that use Infrared Data Association (IrDA) technology to facilitate wireless communication. IrDA allows devices to communicate over short distances using infrared light, typically for transferring files or exchanging data between devices like laptops, PDAs, and mobile phones.

IrDA v30 refers to a version of this driver or the technology itself, typically indicating that it supports faster data rates and possibly some advanced features of IrDA (such as faster infrared communication). This version would have been used with older infrared adapters or laptops/desktops that came with built-in infrared support.