I live in a Norman house with walls of 1m thick on which are backed Norman cabinets filled with paper (worst obstacle of wi-fi) or china cabinets with copper plates (reflective) an environment in brief difficult for the wi-fi. With two of these antennas I aligned, I managed to cover the dead zones of my home. I recommend this product for those who need to overcome obstacles to wi-fi. It should also do a lot of guidance tests in order to find one that offers the best reception. Sincerely.