Provides 4 RS232 Serial Ports over USB PortProvides 4 DSUB-9 ConnectorsBaud Rate from 300 bps to 921.6KbpsSupports 7, 8 Data BitsOdd, Even, Mark, Space, or None parity modeSupports 1, or 2 Stop BitsSupports USB Bus PowerDC Jack for Optional DC 5V Power Input