1、Our expansion card complies with PCI‑Express 1.0 a standard, products that meet this standard can use it. 2、The PCI‑Express speed is 2.5Gb/s, with Full duplex channel support ,just plug and play. 3、The expansion card is compatible with the 16c550 UART standard and 256‑byte transmit and receive. 4、The FIFO high‑speed data transfer rate is up to 250k/sec., which is much quicker than some traditional expension card. 5、The card supports for Windows98/98SE/ME/2000/xp/server 2003/xp 64bit/ Vista/ win7/2008, for Linux, for OX S system. Item Type: Expansion Card Serial Interface: RS232 16c550 UART Standard and 256-byte Transmit/receive Fifo. High-speed Data Transfer Rate Up to 250k/sec. Support RS-232 Hardware: CompatibleControl Data Bit Length: 5, 6, 7, 8 Modem Modem Signal CTS, RI, DCD, DTR, RTS, RS232 Level Conversion: Support System Support: For Windows98/98se/me/2000/xp/server 2003/xp 64bit/ Vista/ Win7/2008, for Linux, for OS X. Equipment Requirements: an Available Pci-expresscard Slot Application Areas: Industrial Computer, Communication, LED Control, POS Machine Guest Display, Card Punching Machine, Telephone Program Control Machine, Telephone Billing Device, Serial Mouse, Flashing Machine Use, POS Serial Printer, Access Control and Attendance, Single-chip Microcomputer, Serial Connection Equipment, Serial monitoring Equipment, Data Acquisition System, POS Terminal and Industrial PC, Parallel Port/print Port Application, Additional I/o Card-serial/parallel/usb, Embedded System-i/o Extension, PCI Design and Simulation, Etc. 99% of Other Universal 9-pin Serial Devices Are Supported System Requirements: PCI-Express X1 Slot 1 x Expansion Card 1 x Compact Disc