2 Port PCI RS232 Serial Adapter Card w/ 16950 UART - Dual Voltage...This 2-port PCI Serial Card offers high performance 16950 UART channels/ports for connecting any new or legacy serial peripheral, with data transfer rates of up to 460kbps. A cost-effective solution for connecting serial modems, POS devices, printers, ISDN terminal adapters and more, the PCI serial card offers dual voltage support, allowing you to use a PCI (5V) or PCI-X (3.3V) slot for installation. A versatile solution, the PCI Serial card supports Windows Vista, XP, ME, 2000, 98, 95 and NT4, and offers IRQ sharing and a PCI plug and play interface to guarantee convenient, hassle-free serial device connections.