... Control Swith Function. It can block the the cell phone,Website:http://www.jammerwill.com, wifi and gps ... halls, theaters; detection centers, brigades, small, medium and large prison; gas stations, oil depots, oil fields, filling stations and ... ■Without any damages to human bodySpecifications■Primary Function: Mobile Phone Handheld Signal Jammer■Material: Aluminum alloy■Interference Frequency- CDMA ...