SLLEA (3.3FT) USB 2.0 to Serial RS232 DB9 9Pin Adapter Converter Cable Windows Win 7 64 CG SLLEA--Determined to become the most professional store of wire! Length:1M (3.3FT). Note: IF you need driver, please contact us. Note:Please take notice of the installation order. Run the driver installer program before plugging in the USB to Serial adapter. If you already plug the device during the driver installation, you need to re-plug the device again for windows to enumerate the device and load the drivers installed.