... Industrial Grade, reliable applicable to kinds of OS PND,MDT support The USB to Dual RS232 converter/adapter ... to convert any standard USB port (USB 2.0 – backward compatible) into two RS-232C ports. The unit uses ... • 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 ...