The multiband-function signal jammer carries GSM, 3G, 4G and Wi-Fi together, which is easy for you, all mobile phone signals will be interfered. Schools, conference rooms, offices, movie theaters, prisons, disco and casino owners in the building all use mobile radio. Mobile phones, like these two-way radio stations, are likely to interrupt the signal sent to the mobile phone. This can be done using a cellphone signal blocker.
