Coolgear PROLIFIC CHIP 16 inch DB-9 Serial Adapter High Speed USB SERIAL RS-232 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 Prolific PL2303HX 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