WINDOWS 10 PRO PROFESSIONAL CD-KEY (32/64 BIT)
From the g2deal.com page:
The key will be sent via eMail. Please check the spam or junk mail folder too.
Notes: CAN'T upgrade from Home system to Pro system, You should download the windows 10 pro system here first , after you installed it, then to activate the code: https://www.microsoft.com/en-us/software-download/windows10 [microsoft.com]
They also have the instructions on the deal page.