StarTech.com Model ICUSB422 6 ft. Professional RS422/485 USB Serial Cable Adapter w/ COM Retention

Add an RS422 or RS485 serial port to your system through USB; features COM port retention 6 ft. Professional RS422/485 USB Serial Cable Adapter with COM Retention USB Serial Adapter / USB to RS232 Serial Adapter / USB to RS485 Serial Adapter / USB Serial Adapter Cable USB-powered with no power adapter required Supports COM port retention to save assigned port settings Faster 921.6Kbps baud rates Includes an attached 6 ft. cable