Once you purchased this item, you will receive your Windows 10 professional OEM license key and download link through an Email.
This key can be used globally on any windows 10 professional language version. The license key is for only one computer. But, it can be reused on the same machine.
This is an activation key which means you must have GENUINE windows 10 professional installed in order to activate with this key. In other words, you need a fresh installation! Download link will be given with the purchase to download Windows 10 Pro directly from Microsoft website.