GadKo USB to Serial Adapter Cable with DB9 Female to DB25 Male Adapter, USB Type A Male to DB9/DB25 Male, 6 foot GadKo is the only authorized dealer of GadKo branded products. This device with 6 foot cable provides a simple and easy way to connect serial devices to a USB port on a computer. With the advantage of a USB port; users have the capability to utilize a peripheral with a serial port interface in an easy-to-use environment such as plug and play & hot swap functions. This adapter is perfect for connections to serial devices with over a 1 Mbps data transfer rate.