Specifications: PCI Bus dual (2) 16C650 serial ports card Fully compliant with PCI 2.2 32 bytes FIFO Support both 64-bite & 32-bite PCI Bus and 3.3V & 5V connector keys High speed serial ports support baud rates up to 921.6Kbps Provides FIFO maximize size 128Kbyte memories, it is 1024 times faster than existing PCI-bus serial ports, which reduce CPU loading and improve system performance dramatically Auto Switch RS-422/485 technology makes user more easy and convenient to manage device without jumpers or switches setting ARSC (Auto RTS Signal Control) technology can identify the status of data transceiver or receiver and send RTS signal automatically, instead of using software to control the transmitter A function of optical isolation (2500V) can prevent lightning or high potential voltage damage The embedded surge protection (600W) for all signals is available in this series Ready for the Intel Itanium and AMD Athlon 64-bit CPU on Microsoft Windows XP 64-bit Edition Version 2003 and Window Server 2003 for 64-bite Itanium-based or Extended Systems Windows 3.x / 95 / 98SE/ Me / NT 4.0 / 2000 / XP / Server 2003 / Dos and Linux O/S Requirement: All operation systems Motherboards with standard PCI south bridge with IDE interface Windows 3.x / 95 / 98SE/ Me / NT 4.0 / 2000 / XP / Server 2003 / Dos and Linux Package contents: One (1) PCI serial port card One (1) software driver CD Users manual