USB HUB to 4 ports RS232 converter 1.Plug and play compliant, hot swappable ... Communication Standard Accord USB1.1 or 2.0, EIA RS232 standardUSB signal VCC, DATA+, DATA-, GND, FGRS-232 ... -point Baud rate300-115200bps, automatic sense signal rateTransmission RS232 side 15M, USB side less than 5MProtection600W sugre protection ... *90mm*38mmShellIronColor WhiteWeight250g USB to 4 ports RS232 converter