Trash Mob Death Machine

As to some students, some of them even use the phones to play games in the class, when they should focus on their study instead. In this case, parents and teachers have taken some measures to limit the time that children spending on the cell phones, among which the mobile phone signal blocker has be...

" Mobile phone jammers can be used in places where the use of cell phones is not welcome. A mobile phone jammer operates in a radius of 20 to 40 meters and jams the CDMA, AMPS, DCS, PHS, GSM and 3G cell phone signals as well as the wireless connections, including wifi signals and Bluetooth. It ...