With the USB 2.0 to RS232 Serial DB9 Adapter Cable from Tera Grand you can turn your USB port into an RS-232 serial port capable of supporting data transfer rates of up to 230 Kbps making it suitable for use with a variety of devices such as modems, handheld devices and pocket PCs, and much more. This bus-powered adapter cable also supports both full RS-232 modem control signals and RS-232 data signals and draws its power directly from the connected USB port.