StarTech.com USB to Serial Adapter - 2 Port - COM Port Retention - FTDI - USB to RS232 Adapter Cable - USB to Serial ConverterThe ICUSB2322F 2 Port USB to Serial RS232 Adapter 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 adapter features COM retention, allowing the same COM port values to automatically be re assigned to the port if the cable is disconnected and re connected to the host computer, or if the system is rebooted. Unlike most USB