A portable cell phone jammer ( https://www.jammermfg.com/cell-phone-jammers.html ) is a device that blocks mobile phone communications by transmitting signals. By using a mobile phone jammer, environmental noise can be effectively reduced and the concentration and atmosphere of the venue can be improved. Especially in academic seminars and important business meetings, the use of mobile phone jammers can ensure that participants are not disturbed by mobile phone notifications and calls, thereby improving the efficiency and effectiveness of the meeting.
