The USB (Universal Serial Bus) to DB25 IEEE-1284 printer cable by Cables to Go enables a parallel printer to be connected to a USB (Universal Serial Bus) port on a PC or hub. This is ideal for computers without a parallel port or in order to free-up the parallel port for a zip drive or scanner. If you have multiple printers, you can eliminate the need for a switchbox by connecting each printer to a USB (Universal Serial Bus) port. The device is fully transparent to the user & is ideal for true bi-directional communication.