StarTech.com USB Adaptor Cables - StarTech.com ICUSB2321F, The ICUSB2321F 1-Port USB to Serial RS232 Adaptor Cable with FTDI chipset and COM Retention from StarTech.com converts an available USB 1.1 or 2.0 port into an RS232 serial DB9 port to connect, monitor and control your serial devices.This compact adaptor features COM retention, allowing the same COM port value to automatically be reassigned to the port if the cable is disconnected and reconnected to the host computer, or if the system is rebooted. The ICUSB2321F uses the FTDI chipset which supports additional customisation, advanced features, and compatibility not necessarily offered by other solutions.Compatibility with a broad list of Operating Systems including Windows®, Windows CE, Mac OS and Linux, makes this product easy to integrate into mixed environments.It is backed by a 2-year warranty and free lifetime technical support. StarTech.com ICUSB2321F USB To RS232 DB9 Serial Adapter Cable