PC Card providing two RS422/485 serial ports. Data transfer rates up to 921,600 baud rates and the 128 byte deep transmit and 128 byte receive FIFOS, coupled with 1Mbit/s line drivers deliver uncompromising performance on your laptop. The detachable cables allow the PC card to stay in the laptop without risk of damage during transit. Drivers for Windows 32 bit and 64 bit Operating Systems including Windows 95/98/2000, XP, Server 2003, Vista, Server 2008 and Windows 7.