This is actually a fuking retail key
you can check from your cmd and type slmgr/dli
bout one from another source and it was a Volume but claimed to be retail.
good shit man.

Windows 10 pro key - got it fast and worked fine

Autant pour moi.
Après mise à jour de mon Windows.
La clé fonctionne parfaitement.

Je recommande

It works! Cheap, fast easy. Saved me so much money

At first I got an error when trying to activate windows 10 pro but 12 hours later key worked. Thanks! :D