USB to 4 Port RS232 Converter, easy to use, plug and play A quick ... Accord USB1.1 or 2.0, EIA RS232 standard USB signal VCC, DATA+, DATA-, GND, FG ... RS232 signal RX, TX, RTS, CTS, DTR, DSR, DCD, ... Band rate 300-115200bps, automatic test signal rate Transmission RS232 side 15M, USB side less than 5M 600W sugre ... 24 04:52:58 USB to 4 Ports RS232 Converter-USB4232