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ExpressCard providing one port RS232. Where absolute compatibility with classic desktop serial COM ports is a necessity. Guaranteed low latency, memory mapped, no compromise high performance interface. Up to 921,600 data transfer rates and the 128 byte deep transmit and 128 byte receive FIFOS, coupled with 1Mbit/s line drivers deliver uncompromising performance on your laptop. Drivers for Windows 32 bit and 64 bit Operating Systems including Windows XP, Server 2003, Vista, Server 2008 and Windows 7.