Are wifi jammers legal , phone jammers illegal workers

Prison 2G / 3G / 4G Cell Phone portable mobile signal jammer black or camouflage
  Prison 2G / 3G / 4G Cell Phone portable mobile signal jammer black or camouflage   Description:      This is a portable type mobile phone signal shielding device .It is  easy to carry, flexible to use, also with optional built-in high capacity battery , so it especially suitable for application in: large venue, infantry troop and military security force, the SWAT team, counter-terrorism unit, the drug control unit, explosion-proof, EOD team, checkpoint, the hostage negotiation, and border control, etc.   Functional characteristics:        1. High RF power, shielding all 2G, 3G, 4G signals, frequencies can be customized by customers.        2. it can with multiple power supplies :if with built-in battery, it can provide power for the jammer                      working about 2 hours. Also it can be powered by 220V AC or an on-board power supply.        3. Efficient cooling heat dissipation system ,including high performance aluminum alloy heat sink and              several wind fans, so the jammer can non-stopped work for long time.        4. this jammer can be customized as 3 or 4 0r 5 or 6 bands ,and each band could be 10 watts or                            15 watts as customer’s  request.        5. use DDS technology,keep the precision of th e frequencies. Specifications:   Output interface Shield band of frequency RF output power Output power/channel CH1 851-894 MHz 15w 17 dBm/30KHz(min) CH2 1805-1880 MHz 15w 14 dBm/30KHz(min) CH3 2110-2170 MHz 15w 15.5 dBm/30KHz(min) CH4 2100-2170 MHZ 15w 15.5 dBm/30KHz(min) CH5 925-960 MHz 15w 17.5 dBm/30KHz(min) Power supply: AC110-220V Shielding area: 30-100M @ according to signal density of mobile network Power consumption: 200W  Weight:20Kg  Size(length × wind × high):390×390×240mm Humidity: 30%-95%                   Running Temperature: -20 to +55 Celsius Degree         Competitive Advantage:     Easy of mobility, can be carried like a trolley.     High Power RF amplifiers with VSWR and temperature self-protection technology.   with good cooling system, can operate for long time.   Using digital interference technology, overall effective suppression of target spectrum    independent module design. Each module can separate switch,disassemble. So it is                 convenient for maintenance and update.  Perfect Alarm System, fully protected circuit in case of disconnection of antennas.     Applications:   large venue, infantry troop and military security force, the SWAT team, counter-terrorism unit, the drug control unit, explosion-proof, EOD team, checkpoint, the hostage negotiation, and border control, etc.  

are wifi jammers legal

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