8 Bands All Cellphone Signal Jammers
This kind of interference device has the characteristics of interference signal stability and is not easy to be affected by occlusion. Even if there are obstacles in the middle, they can play a good role. Therefore, you can put jamming devices in the next room to achieve the purpose of jamming
Normally, this kind of equipment also has the function that output power can adjust, can adjust interference range according to oneself need.