C0012BL-Black USB 2.0 to 9-Pin RS232 COM Port Serial Convert

http://www.gadgettown.com/Usb-2-To-9-Pin-Rs232-Convert-Adapter-Black.html
This Convert Adapter is great for serial devices that you want to convert to USB. The Cable is a fast solution for peer-to-peer file transfer between two computers via the USB port.