Hi, I have a question. I need your help. I play music at home, but always feel voice caton, I checked all the equipment there is no problem, could it be caused by interference signal jammer will card, can you help me? The only place that you need to install wi-fi and cell phone jammer is some kind of religious place, like a temple or a church, and of course, there’s a big corporation, and time is thought to be money, employees can’t use their phones, and they should be working. Mobile jammers can also be installed in major theatres, cinemas or concert halls.