US Robotics 005698-00 is a PCI Faxmodem compatible with Windows 95, 98, and NT. It offers 56K data and 14.4K fax capabilities, allowing for fast internet access and reliable faxing. The modem includes voice features, enabling hands-free operation and caller ID display. It also supports multiple phone lines, making it suitable for both home and small office use. Installation involves inserting the modem into an empty PCI expansion slot, connecting it to an analog phone line, and installing the provided drivers.