COM port settings are retained for serial devices plugged into different USB ports saving time， Easy plug and play installation with our USB Powered adapter - no power outlet required， USB to Straight-Through RS232 Serial Adapter， Supports data transfer rates of up to 920kpbs， COM Port assignments maintained across reboot， Powered by an available USB port - no external power adapter required， Provides dual buffers for upstream and downstream data transfer， Supports remote wake up and power management control