Add an rs422485 serial port to your system through usb features com port retentionr r usb powered no power outlet required and no cumbersome ac adapter to carry aroundr supports high speed rs 422rs 485 communication up to 9216kbps 400 faster than most usb to rs 232 adaptersr com retention saves the assigned port settings for the device so disconnectingreconnecting is hassle freer r the icusb422 6 ft professional rs422485 usb serial cable adapter with com port retention lets you conne