The CompUSA 271773 High Speed PCI Card is a plug-and-play interface card that provides 2 serial and 1 parallel port adapter. With a total of 3 ports, this PCI card by CompUSA is compatible with PCI slots and is designed to easily expand the external interfaces of a computer for added connectivity options. The model 271773 is ideal for users looking to enhance their computer's capabilities with additional serial and parallel ports for enhanced functionality in data transfer and connectivity.