Desktop 6-band adjustable power GSM/3G/4G blocker device

This signal jammers device can jamming all cell phone signals such as 2G, 3G , 4G. Except for cell phone signals, it can also jamming WiFi and PHS signals. The device is available in classrooms, libraries, cinemas, offices and other places where cell phone signals and WIFI signals are prohibited. Because the desktop block device has more jammer range and more stable jammer performance, this device is deeply loved and trusted by customers.
This desktop jammers has the output power adjustable function. Your can adjust the blocker range as needed. You can control one of the frequencies individually, choose to turn on or off, and control the range of jammer signals. It is really super convenient. A jammer is equivalent to several non-adjustable jammers. You can adjust the jammer's interference distance according to your ideas at any time.