I believe that's correct, it's probably just for FCC compliance. However, I would steer clear of it since I recently tried to update my Archer C3200 (US) v1 with the appropriate firmware via the US site which was put out for the same reason and it bricked the router (couldn't reset it, ping it, etc.). Called tech support and was told I voided the warranty by upgrading the firmware, which is ridiculous. Obviously the Archer C3200 firmware wasn't tested so I'd be leery of any other US-only firmware they put out for the same reason (FCC compliance).