Doorjammer portable door lock

The 8 Bands Adjustable Powerful Worldwide Mobile Jammer ， latest model of our powerful product for repairing large buildings. The frequency range it uses is very compelling, because when this device is turned on, all popular frequency bands will stop working, and even part of the low-frequency spectrum will also stop working. In addition, you can determine the frequency of blocking before placing an order, so that our technicians can adjust the product according to your wishes.As a rule, this strong signal jammer is installed inside the offices, houses, or any other large buildings to organize wireless safety. When it works, all bands which you selected will not work in its operating radius of 40 meters. In addition, you can adjust the output power of your device to prevent interference with other buildings around if there is such a necessity. As you can see, this device is flexible in relation to the working range of its signal and this might be handy in organizing your wireless safety more precisely.8 bands frequencies blocking most cell phone signalsAdjustable button to min or max single bandWith car chargerGood cooling system, face temperature below 45℃(using under normal temperature)Jamming range up to 40 meters (signal strength

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