Add two high performance RS232 serial ports (DB9) to your low or full-profile computer, through a PCI Express slot - 2-Port PCIe Serial Card with 16C1050 UART - RS232 - Dual channel 16C1050 UART for full compatibility with 16C1050 devices - 256-Byte deep FIFO per transmitter and receiver - Maximum data transfer rate of 460 Kbps 2-port PCIe RS232 serial card / serial card / PCI serial card / PCIe serial adapter