Rocstor Premium 4 ft Parallel Printer Adapter enables you to add a DB25 parallel port to any PC or Laptop with a free USB port, transforming an existing USB port on a host PC/Laptop to a DB25 female parallel port as if it was configured that way. An economical and efficient answer, the USB to DB25 adapter avoids having to replace a parallel printer with USB capability. Backed by Rocstor 2-Year Warranty.