... Industrial Grade, reliable applicable to kinds of OS PND,MDT support The USB to Dual RS232 converter/adapter is ... a port-powered USB to dual RS-232 converter that can be used to convert any standard USB port ... • Industrial grade design, adds two RS-232 ports to USB port, compatible with MDT,PND.• FTDI 232BL ... RI, and GND.• Data transfer rates from 300 Bps to 921,600 bps• Internal 128/385 Byte Tx/Rx ...