The Phoenix Contact 2400573 is a software package called UPGRADE WIN 7 PRO SP1 X86-EN. Here are its key details:

Functionality: Kit for upgrading a Windows XP operating system to Windows 7 Professional SP1 (32-bit, English)

Contents: Includes a USB drive and a Microsoft Certificate of Authority (CoA) sticker

Compatibility: Works with Valueline and Basicline computers originally manufactured with Windows XP Professional

Important Note: Using this tool overwrites all previously stored data, so backup is necessary before installation