This PCI Express Card is designed to add 2 serial ports to your PCI Express-capable desktop computer. Ideal for connecting to your printer, ISDN terminal and other serial port devices.\n\n- Add 2 serial ports to your desktop computer\n- Compliant with PCI Express base specification revision 1.1\n- Single-lane PCI Express with throughput up to 2.5Gbps\n- On chip 256-byte depth FIFO in transmit, receive path of each port