How do cell phone signal boosters work - how to block mobile phone signals

8 Band Portable High Power Jammer Cellphone/Wi-Fi /Bluetooth/Lojack /GPS Glonass/Galileol1/L2/Wi-Fi/Bluetooth  High Power Portable 8Bands Jammer/Blocker Vodasafe P8plus Brief description： High power Vodasafe portable jammer P8plus is updated version of P8, it can effectively block CDMA,GSM,3G UMTS,4G LTE cellphone ,GPS,Wi-Fi/Bluetooth ,Lojack ,it could block all types of Android phones, Tablets, Smart Phones, iPhones, Win phones etc. This portable jammer could work for wireless 2G, 3G, 4G, WiMax, Wi-Fi, Bluetooth ,GPS Lojack signals,you could choose this model that will be work stably and reliably.The blocker could create a quiet zone around you and prevent leaking of information in sensitive areas. Features: * Compact Size and easy carry * Each band can turn ON/OFF without influencing the other bands operation * Rechargeable powerful battery  and can be used outdoors * Good cooling system can working long time  * Could be used in Vehicle directly, With car charger for mobile using * Support use while battery charging * Only interfering downlink and no interception on the base station. Applicable place:  For car, truck, bus, van, or even boat security, stop GPS tracking devices For meeting rooms, conference rooms, museums, galleries, theatres, concert halls, churches, temples, restaurants, classrooms, training centers, factories, banks, hospitals. Specification Total Output Power: 8Watt Cover Radius: 5-30m(under Signal level ≤-85dBm)@according to the signal density mobile network Jamming type: Sweep Jamming Antenna Type: 2.5db high gain omni-directional antenna   Power Supply: Rechargeable lithium Battery /AC adapter (50 to 60Hz/100 to 240V AC –DC12V) and 12V car charger  Built-in Rechargeable lithium Battery: 8000mAh  Working time of Battery : 3Hours Electric Filed (SAR):Compatible with ICNIRP Standards(Human safe) Operating Temp:-20 to +50℃ Storage Temp:-40 to +60℃ Humidity: 5%-80% Dimension(LXWXH): 156 x 83 x 48mm not include antennas Inner box dimension:250x240x70mm weight:1.5kg                                  Order Information : P8plusB jamming for CDMA/GSM/3G UMTS/4GLTE Cellphone +GPSL/Glonass/GALILEOL1/L2/Wi-Fi/Bluetooth America Type frequency for United States, Canada ,S. America.  1. GSM850/CDMA850MHz: 850-894MHz  1W  2.2G1900MHz: 1920-1990MHz  1W (GSM/CDMA/PCS) 3. 4GLTE700MHz:729-790MHz  1W 4.3G2100MHz:2100-2170MHz  1W ( 3GUMTS/WCDMA/TD-SCDMA/CDMA) 5. Wi-Fi/Bluetooth:2400-2500MHz  1W  6. 4G WiMAX:2500-2700MHz   1W  7. GPS/Glonass/Galileo L1:1570-1620MHz  1W  8. GPS/Glonass/Galileo L2:1200-2300MHz  1W  Total Output Power: 8W      Package contents:     1pcs Portable Signal Jammer 1pcs AC Charger 1pcs Car Charger 8pcs Antenna

how do cell phone signal boosters work

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