... play A quick and easy way to expand your PC's port count and to adapt serial devices toyour USB ... and play compliant, hot swappable 2, Add 1 to 4 serial ports 3, Multi-interface RS-232 model ... USB port powered- no external power needed on USB to serial models Standard Accord USB1.1 or 2.0, ... , CTS, DTR, DSR, DCD, RI, GND Asynchronism, point to point or multi-point Band rate 300-115200bps, automatic test ...