... to RS232 converter, 2.0 USB232 USB smart adapter cable lets PC users add an additional serial port for RS-232 ... , EIA RS232 standardUSB signal VCC, DATA+, DATA-, GND, FGRS-232 signalRX, TX, RTS, CTS, DTR, DSR, DCD, RI, ... RS-232 side DB-9 male Environment Working temperature-20 to 60Storage temperature-25 to 85Humidity Relative humidity 5% to 95% ... -04-24 04:55:10 Universal USB to RS232 converter--USB232