Different environmental interference effects are also different. The interference range in open areas is greater than in areas with many buildings. This is why the measured interference radius is usually better than the actual range. Because the test is in an open place. Since the signal will be blocked/interfered by stone walls, the grid forms a Faraday cage (including "fake" lead windows) and tin foil insulation and other metals, which interfere with indoor coverage areas, and the reliability of the equipment will be very low. This means that if you use Cell Phone Jammer Law For Buisnesses indoors, the wall may block the signal and prevent it from interfering with the signal in another room. There are many necessary tests, such as battery life, transmission frequency, etc., including interference radius testing. Because these devices are often tested in open areas, manufacturers always believe that the test results are more effective than actual conditions. You know that buildings and various concrete structures can interfere with signal transmission. Most of us live in big cities, surrounded by skyscrapers. The signal strength of the local mobile phone is also an influencing factor. So, don’t be surprised if your interfering device cannot block calls within 30 meters. cell phone jammer
The mobile phone signal jammer emits the same radio frequency as the mobile phone, so its working principle is similar to Cell Phone Jammer Law For Buisnesses . This will cause enough interference to prevent the call from connecting to the phone. Currently, there are two types of mobile phone jammers. The first category is usually a small device that prevents the signal from being sent from the cell phone tower to each cell phone. The blocking frequency is 800MHz to 1900MHz. Most devices using this technology can block signals within a 30-foot radius. The phones in this area do not display any signals. Now you can close them politely and leave, or you can buy a cell phone jammer and leave them alone.
