The ICUSB2321F 1-Port USB (Universal Serial Bus) to Serial RS232 Adapter Cable with FTDI chipset & COM Retention converts an available USB (Universal Serial Bus) 1.1 or 2.0 port into an RS232 serial DB9 port to connect, monitor & control your serial devices. This compact adapter features COM retention, allowing the same COM port value to automatically be re-assigned to the port if the cable is disconnected & re-connected to the host computer, or if the system is rebooted. Unlike most of USB (Universal Serial Bus) to serial adapters, this one uses the FTDI chipset which supports additional customization, advanced features, & compatibility not necessarily offered by other solutions. Compatibility with a broad list of Operating Systems including Windows, Windows CE, Mac OS & Linux, makes this product easy to integrate into mixed environments.