The is a software package provided by Intel that enables the communication between your Windows computer and an Intel WiMAX Link 5350 hardware device. WiMAX (Worldwide Interoperability for Microwave Access) is a technology that provides wireless broadband connectivity, typically used for long-range internet access. The "function driver" allows the operating system to properly interact with the WiMAX adapter or module installed on your system, ensuring that it works efficiently for connecting to WiMAX networks.