StarTech.com USB Adaptor Cables - StarTech.com ICUSB232PRO, The StarTech.com ICUSB232PRO USB to RS232 Serial DB9 Adaptor Cable with COM Retention offers a professional grade solution for connecting legacy or industrial RS232 serial devices to a laptop or desktop computer through USB, so eliminating the expense of upgrading serial peripherals for compatibility.A time-saving and convenient USB/Serial solution, the adaptor retains assigned serial COM port values in nonvolatile memory, allowing the same values to be automatically assigned to the adaptor serial port if disconnected and reconnected, or disconnected from one USB port and installed in another.A versatile connectivity solution that bridges legacy serial peripheral devices with newer USB-capable computers, the USB to Serial adaptor offers broad operating system compatibility including Windows®, Linux and Mac OS, for easy integration into mixed environments.It is backed by a 2-year warranty and free lifetime technical support. StarTech.com ICUSB232PRO USB To RS-232 Adapter With COM Retention