Yeah it's technically a Mac keyboard but you can plug it in a PC and use it. Like burz said you have to use a third party program like autohotkey or something to swap the window and alt key. After that you might need to map a few key like insert, delete, print screen... Etc since Mac doesn't have those functions on their keyboard.
As for the PC version it's estimated to come out end I this year, so it's gonna be a long wait. Kind of why I end up buying the Quiet Pro in the end
