The Living Force
I think the point of those devices is offering protection in an EMF heavy environment so it shouldn't be necessary to remove sources of EMF in order to notice any difference. In an environment with little EMF, no wifi or cell phones there wouldn't be that much need for Q-Link anyway.
That's what I meant, that if you live in an environnement with little EMF, it could explain why you don't notice any difference with this device.
But, because of the langage barrier, I'm not sure I really understood what you said too !