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Product Description Do you still think that owning a cell phone jammer that can both block 4G LTE and 4G Wimax signal is a dream? Then with the 3G/4G All Frequency Cell Phone Jammer with 5 Powerful Antenna (4G LTE + 4G Wimax) being invented, this goal can be achieved. Besides jamming the 4G LTE and 4G Wimax signals at the same time, it also owns the ability to block CDMA, GSM, DCS, 3G signals as well. This is really the most perfect and powerful jamming device by now. With adjustable output power, this GSM&3G&4G Cell phone jammer can work 24Hours / 7 days continuously, each band can be controlled in separately way. You can use it in the following places, such as Meeting Room, Oil and Gas Storage Facilities and fields, Hospitals, Theatres, Recording Studios, Banks, Contract Tendering Rooms, Churches, Conference Rooms, Classrooms, Testing Facilities, Security Services, Military Units, Secret Services, News Conference Rooms, Libraries, Museums, Prisons, Courts, Border Patrol and Drug Enforcement, Customs, House, etc. In a word, this is really a perfect cell phone jammer no matter seen from the function, the price and the quality. Are you attracted? If you are looking for a jamming device like this, do not hesitate, just take action and add this perfect portable cell phone jammer to your cart Specification RF Frequency: GSM850 (850-894MHz) GSM1900 (1930-1990MHz) 3G (2100-2170MHz) 4G(Wimax): (2345MHZ- 2400 MHz) 4G (LTE): (725770 MHz) Total Power: 12watt Power Supply: AC 110-240V / DC 5V Shielding Radius: Up to 40 meters (signal strength