Whether you need a cell phone jammer to block a signal in a small indoor space or a medium sized outdoor radius, our variety of devices offer a solution for any application. Each of these fixed location signal blockers describes what the best uses are, as well as the amount of jamming coverage area you can expect. Be sure to note if you need a 4G jammer as this band is not covered by all units. Need mobility? See our portable mobile blocker section. As always, if you have any questions we are happy to assist you.