Designed to add one 9-pin RS-232 serial port to your computer via an available USB port ^^ Supports USB data transfer rates up to 12Mbps and serial port data transfer rates up to 921Kbps ^^ Works flawlessly with RS-232 serial devices such as modems, ISDN terminal adapters, PDAs, bar code scanners, label printers, and many more. Fully compatible with serial apps on Windows and Mac ^^ Built with quality FTDI FT232 high performance processor chip, which makes it one of the most reliable USB to Serial adapters on the market