According to the strength of the blocker power, its interference range is also different. This kind of phone jamer is an upgraded version of the personal signal blocker. Its interference range is wider, and the interference radius can reach 15M. It is also a popular jammer on the market. Its advantages are high portability and high cost performance. Low noise, absolutely good quality and low price, suitable for some places where the use of environmental is simple and the signals shielding requirements are not very high, such as cars, home users, small conference rooms and so on.