Startech PEX2S5531P, Bus PCI Express, Port-2, FIFo 128 Bytes, Max Baud Rate 460.8 Kbps, Maximum Data Transfer Rate RS-232 - 460.8Kbps, Parallel - 1.5Mbps, Protocols EPP, ECP, SPP, PS/2, Connector 1 - PCI Express x1 Male, External Ports 1 - DB-25 (25 pin, D-Sub) Female, 2 - DB-9 (9 pin, D-Sub) Male, Internal Ports 1 - LP4 (4 pin; Large Drive Power) Male, Included 1 - 2 Port PCI-Express Serial Card, 1 - Parallel port (with ribbon cable), 3 - Low Profile Brackets, 1 - Driver CD, 1 - Instruction Manual. The PEX2S5531P 2S1P PCI Express Card turns a PCI Express slot into two RS232 (DB9) serial ports and on