Mobile Phone Signal Blocking

5 Antennas Portable High Powered 3G and 4G Cell phone Signal Jammer Specifications■Primary Function: High Powered Cell phone,Website:http://www.jammerwill.com, 3G, and 4G Signal Jammer ■Highly portable design ■Isolating Signal Bandwidth: - CDMA: 850 - 960Mhz- GSM: 925 - 960Mhz - DCS: 1805 - 1880MHZ - PHS: 1900 - 1990MHZ- 3G: 2110 - 2170Mhz - 4G WIMAX: 2345-2400MHz or 2620-2690- 4G LTE: 725-770MHZ ■Antenna: 5x Omni-directional Antennas ■Coverage Area: up to 20 meters ■Power Source : Wall plug, car adapter, or built-in battery ■Internal Battery: 1600mAh rechargeable li-ion ■Typical Battery Life: 2-3 hours of continuous use ■Total Output Power: Up to 3W ■Operating Temperature: -10 to +50 Celsius ■Operating Humidity: 5% to 80% ■Power Supply: 100-240v, 12v ■Approved: CE / FCCPackage Contents ■1 x Signal Jammer with 5 Antennas■1 x Power Adapter■1 x Car Charger■1 x User Manual - EnglishProduct Reviews:1. Fantastic Jammer, excellent quality at a reasonable price.2. thanks, just a week I got my package, good,3. all function well, thanks. hope my review will help other friends to make a decision.4. a new place for my digital life, will be a long term customers here.5. thanks, all OK, will be back for more deal.6. It's a powerful device. Very good!7. it's useful, thanks for this device.8. I tried to use it wherever I found people were using cell phones. It did work well.