Tripp-Lite U209-000-R USB to Serial Adapter - New
USB to serial Converter. Upgrading your computer and find out that your trusty old serial printer, UPS, or Modem wont work with it because your new computer doesn't have a serial port. USB to Serial adapter will fix your problem. This adapter converts Standard RS-232 to USB so your older equipment can still be used with your new computer. Null modem cable or adapter is required for use with serial Printers.