• Adds four RS-232 serial ports to PC or Mac computer via a USB port
• Supports serial port data transfer rates up to 128Kb/s
• Built in 15KVDC ESD serial interface protection
• Supports USB data transfer rates up to 12Mb/s
• Supports USB plug-and-play
• Built in 512 byte FIFO buffers and software flow control
• Powered by USB bus, no external power needed
• Chipset: Prolific PL2303HXD
• Compliant with USB Specification, Revision 2.0
• Connectors:
• 4, 9-Pin, DB9, Output, Male
• 1, 4-Pin, USB, Type A, Input, Male

Cable length:

• Total length: 33 inches
• Serial port 1: 13 inches
• Serial port 2: 20 inches
• Serial port 3: 27 inches
• Serial port 4: 33 inches
• Cable color: Black

http://www.ftdichip.com/Support/Documents/InstallGuides.htm