Low profile PCI Express Card providing one opto isolated RS422/485 serial port. Data transfer rates up to 921,600 baud rates and the 128 byte deep transmitand 128 byte receive FIFOS, coupled with 1Mbit/s line drivers deliver uncompromising performance on your PC. Drivers for Windows 32 bit and 64 bit Operating Systems including Windows 2000, XP, Server 2003, Vista, Server 2008, Windows 7 and Windows 8