Blocks All Mobile Phone Signals and All Frequencies World Wide.
Can be used in different places, such as school, university，examination room, gas station, church, court, library, meeting room, government, theater, military area and so on.
Works as soon as the phone is in the bag, stops blocking the signal once you remove the phone.
If you do not want to answer the call, you can put the phone in the bag, Caller Will See Phone as Unavailable or Network Busy
* 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 block radiations and degaussing.
* Dimension: 104mm x 93mm x 4mm (L x W x D)
* function efficieny:99.9%
No harm to human body or other electronic devices