Startech PEX2S953LP, Bus PCI Express, Ports-2, Data Bits 5, 6, 7, 8, 9, FIFO 256 Bytes, Control Xon/Xoff, RTS/CTS, Max Baud Rate 921.6 Kbps, MTBF 222,366 hours, Stop Bits 1, 1.5, 2, Connector 1 - PCI Express x1 Male, External Ports 2 - DB-9 (9 pin, D-Sub) Male, Internal 1 - LP4 (4 pin; Large Drive Power) Male Input, Included 1 - PCIe Serial Card, 1 - Full-Profile Bracket, 1 - User Manual. This RS232 Serial Adapter Card lets you add two RS232 (DB9) serial ports to your computer through a PCI Express (PCIe) slot. It enables you to interact with serial devices, such as card readers, printers, PIN pads,