Product Description The product you are viewing is the 70W High Power Cell Phone Jammer for 4G LTE with Omni-directional Antenna. It can not only block the signals of 3G, CDMA, GSM, DCS and PCS, but also can block the signal of 4g LTE. Besides it owns Omni-directional Antenna so it can block the signals from all directions and the jamming distance of this one can up to 100 meters at most. And it owns the special design of automatic power switching power supply and every band frequency can select output power and it is adjustable. What’s more, all the TX frequencies cover downlink only, and it is especially good at blocking 3G signal. And by using the AC adapter it can working without stopping even all the year round. Such kind of high quality jammer can be applied in prison, guard, invigilate meeting room, library, theater, class room and so may other places to help create quiet environment or prevent important information letting out by cell phones. Being attracted? If you want to know more information about this one just come here, contact with us then you will gain it. If you want one just add one to your cart and we will certainly offer you the product that owns both high quality and reasonable price. Specifications Affected Frequency Ranges: -CDMA:850-894MHz -GSM:925-960MHz -DCS/PCS:1805-1990MHz -3G:2110-2170MHz-4G(LTE):725770 MHz Power supply:AC adapter(AC110/220V-DC27V) Shielding Radius:(20-100) meters@-75dBm still depends on the signal strength in given area. Total output power:70W Weight:19kg Size:34*13*27cm Product Notes Make sure to connect all the antennas firstly before the power supply is switched on. Please do not take off antenna when the machine is working. Antenna shall be used vertically to the ground for working more efficiently. Please don’t put the jammer in the bad Condition of over-wet, over-hot, high voltage and high magnetism. The jammer shall be installed in the position with good ventilation, and large-scale things shall be avoided to ensure the shielding effect.Accessories Power adaptor Antennas Important Notes for Jamming Distance: The jamming distances we mentioned on website are for customer’s reference only. The actual jamming distance will be varied depending on the signal strength and the use location and if full charges, etc. Important Notes for Portable Jammers with No Cooling Fan: Do not use the jammer when it is charging, or it will burn the jammer as it has no built-in fan. If because of this factor due to the broken of the jammer, the customer will lose the authority of free repairation .