RT Systems Original KRS-271/281 USB Software (Version 4.50) and USB Programming Cable (USB-K5D) for the TM-271A and TM-281A Version 4.50 Software - Spreadsheet layout with many point and click options. "Read" the current configuration from the radio for editing or start from scratch in a new file. The programmer has copy and paste of memory channel information between files. Column editing for changing several channels with minimal typing. An easy interface to ARRL Travel Plus, RFinder-Worldwide Repeater Directory, Radio Reference, or Repeater Book to get repeater information. (separate purchase or subscription may be required) Ability to copy and paste spreadsheet or website data. Much more than just memory channel programming with settings for other radio menu items. RT Systems Cable (USB K5D) & Programming Software (Version 4.50) for Windows XP, Vista, Windows 7 (32 and 64 bit) or Windows 8 and 8.1 (full version)