WiFi and Bluetooth bands are typically used to access the wireless Internet. They operate in the 2.4GHz frequency range. Despite its undisputed usefulness WiFi and Bluetooth frequencies may be used by the government for potentially dark activities that may violate your absolute privacy. For example, indoor tracking is propagated along with lightning speed. WiFi activity is used to track your location indoors, primarily through hot-spot triangulation, in a manner similar to triangulation of the location of mobile phone towers. Bluetooth is also used for indoor tracking, especially in Bluetooth beacon tracking technology. But WiFi signal blocker can protect your privacy and hide your location indoors.