licensing question

Hello,

I’m using Win2USB to create a bootable version of Windows 10 on a USB flash drive. And I had a question about Windows 10 licensing.

If I use the bootable USB drive to launch and run Windows 10 on multiple computers, do I need a Windows 10 license for each computer? Or do I just need a single Windows license for the bootable Win2USB version of Windows 10? Also, is there a difference in Windows 10 licensing issues among the free, professional, and enterprise versions of Win2USB?

Thank you for you help on this.