Coolgear 6ft USB to DB-9 RS232 Serial Converter with FTDI Chipset Adds one RS-232 serial port by connecting to a USB port Draws its power from the USB connection. Power adapter is not required High speed serial port with the baud rate up to 921.6K bps FTDI Chipset OS Compatibility: Windows 98, Me, XP, 2000, 2003, CE, Vista, Windows 7, and Windows 8 as well as Linux and Mac OS 10.X