The HP un2400 Mobile Broadband Module Modem Windows Driver is a software package that enables your computer to communicate with the HP un2400 Mobile Broadband Module, a built-in wireless modem typically used for cellular data connections. The un2400 module is a 3G/4G wireless card often found in HP laptops and tablets, allowing them to access mobile broadband networks for internet connectivity when Wi-Fi isn't available.

The driver ensures that the Windows operating system recognizes the module and allows it to establish connections to cellular networks. Without the proper driver, your device may not be able to connect to mobile data networks or recognize the modem.