Is there a device that can block wifi

First of all, some of our equipment can really help you solve your neighbor’s Wi-Fi network problems. We have dealt with these issues. First of all, you should know that your neighbor cannot really help you, because even if he changes the password, it may be cracked. It's very simple, so I can say that if your child is an experienced PC user, he will be able to do this. Wi-Fi networks are indeed very fragile, because the distribution of radio frequencies used by Wi-Fi cannot be simply restricted.

But the good news is that you can easily stop them. As far as I know, you need to block Wi-Fi in a considerable area to cover the entire house. In this case, the best option is to fix the wifi jammer. This will ensure that the wireless network has failed within a radius of 40 meters (130 feet). In addition, we should mention that many people worry that these signal blockers may endanger our health, but we can assure you that this is wrong.