Universal PCI providing four RS232 serial ports with Opto Isolation on TX RX and GND lines (RTS, CTS and all other lines are not connected). 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 PC.Includes drivers for all Windows 32 bit and 64 bit Operating Systems, including Windows 10.