Universal PCI providing four low profile RS232 serial ports with Opto Isolation on TX, RX, GND, CTS & RTS lines. 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 8.