The Frequency Blocking Bag designed for blocking all wireless frequencies, produced or receiving by mobile phone machines, GPS trackers, GSM trackers etc. The frequency blocking bag offers an ideal solution for pack small electronic gadgets which signal shield required. 

A frequency blocking bag is usually using to block cell phone machines in special locations. After put a cell phone into the bag and seal the cover, the cell phone will loss signal seconds later and can not be reached any more. It will appear unavailable or network busy. 

The frequency blocking bag could blocking radiations and degaussing.

The mobile phone signal blocking bag is made by nami special frabic, which insert tiny meshwork.  The working principle is similar to put a cellphone into a sealed metal box.

This two layers blocking bag comes with dual functions. One of the bags could not blocking signals, another one bag could block wireless frequencies 99.9%. Attenuation intensity is 90dB.