This Professional grade USB Serial Adapter cable converts a USB port into an RS232 serial port, allowing you to connect serial devices to a computer through an available USB 2.0 port. Once connected, the USB to serial adapter retains assigned serial COM port values, allowing the same values to automatically be re-assigned to the ports provided by the adapter in the event it is disconnected, then re-connected to the host computer.This innovative USB to Serial adapter offers a professional grade solution for connecting legacy or industrial RS232 serial devices to more modern computers, or computers with unused USB ports perfect for connecting serial modems, barcode scanners or any device with serial sync to a host computer USB port, eliminating the expense of upgrading the serial peripheral for USB compatibility.