Buy on Amazon.com : http://www.amazon.com/gp/product/B004ET6R50?tag=lottalatte-20 <br /> <br />SerialGear? USB BAY-4 Port Serial DB-9 RS-232 Adapter with FTDI Chipset <br /> <br />Data Rate from 75 bps to 9216Kbps <br />512-Byte Deep FIFOs for each Port <br />Supports 5678 Data Bits <br />Supports 3-wire RS232 Signals TXD RXD GND <br />Rigid Metal Case for Critical Applications