This is a Best Data Windows Internal Modem (56HP) compatible with Windows 98, XE, 2000, XP. It has a maximum data rate of 56 Kbps, V.92/V.44 standards, and a DSL/Phone (RJ-11) interface. The modem has 1 port, is a unit type device manufactured by Best Data Products in China, with a 1-year manufacturer warranty. It is a PCI compatible modem card.