I often hear it interfere with radio waves. You can easily disable familiar devices. Super cheap, the new product mobile cell phone jammer can be sent for free, and it is wholesale in batches. In the test position, you can block all signals from smartphone radio circuit breakers and mobile phones. It can also be adjusted to the radio wave cutoff distance. It is suitable for mobile phone jammers developed to maintain a safe and comfortable space. It is easy to operate and only needs to press a button. Sales and wholesale/retail stores, with a 1-year warranty! We will continue to do our best to provide services that can meet customer needs. You can adjust the on/off of each mobile interference cut-off frequency band, radio wave strength, radio wave distance and function. This product 4G mobile phone jammer also has independent Power and adjustment buttons for each antenna. In addition, you can set the radio frequency bands you want to block or don't want to block according to customer requirements. I don't want to block the radio signal frequency band of the phone, but I can only cut off the radio waves of gps and WiFi.