This is the software required to program Panasonic Business Telephone Systems US version. This software supports the following systems KX-TDA50, KX-TDA100, KX-TDA200, KX-TDA 600, KX-TDE100, KX-TDE200, KX-TDE600, KX-NCP500, KX-NCP1000 Software version 7.8.1.1R15 release date 2/11/16 Works on Windows XP or later computers. Windows 10 64 bit drivers included.