StarTech.com USB Adaptor Cables - StarTech.com ICUSB2322F, The StarTech.com ICUSB2322F 2-Port USB to Serial RS232 Adaptor Cable with FTDI chipset and COM Retention converts an available USB 1.1 or 2.0 port into 2 RS232 serial DB9 ports to connect, monitor and control your serial devices.This compact adaptor features COM retention, allowing the same COM port values to be automatically reassigned to the port if the cable is disconnected and reconnected to the host computer, or if the system is rebooted. Unlike most USB-serial adaptors, this uses the FTDI chipset, which supports additional customisation, advanced features, and compatibility not necessarily offered by other solutions.This USB-serial adaptor is compatible with a broad list of Operating Systems, including Windows®, Windows CE, Mac OS and Linux, making this product the perfect solution for integrating into mixed environments. It is backed by a 2-year warranty and free lifetime technical support. StarTech.com ICUSB2322F USB To 2 Port RS232 DB9 Serial Adapter Cable