Cell Phone Scrambler For Schools

8 Bands 3G 4G Cell Phone GPS Wifi Lojack Jammer - For Worldwide Features ■Multiple bands ■High output power ■Cooling fan inside,Website:http://www.jammerwill.com, Could be used in car directly, With car charger and AC charger ■With Built-in Battery: 4000mA/h, Charge full time about 6Hours, Working time: 1-2Hours. Specifications■Isolating Signal Bandwidth: - CDMA/GSM: 850MHz - 960MHz - DCS/PCS: 1805MHz - 990MHz - 3G: 2110MHz - 2170MHz - GPS: 1570MHz - 1610MHz- WIFI: 2400MHz - 2485MHz- LOJACK: 168MHz - 178MHz- 4G(LTE): 725MHz-770MHz / 790MHz-862MHz- 4G WIMAX: 2345MHz-2400MHz / 2620MHz - 2690MHz■You can select 8 of above frequency bands you need in a jammer ■Total output power: 4W, Small size design so the temperature is a bit higher ■Shielding Radius Range: up to 20m, the jamming radius still depends on the strength signal in given area ■External Omni-directional antennas all the TX frequency covered down link only ■Power supply: 50 to 60Hz, 100 to 240V AC ■With AC adapter (AC100-240V-DC12V), 4000mA/H battery Application Area■It can be applied at meeting rooms, conference rooms, trains, bus and more ■For some locations of special purpose such as hospitals, gas stations and more, Please do field test first to make sure no interference happened to the normal operation of their equipment and instrument ■ATTENTION: Before turning on the device, you must install the antennas accordlng to the mark indication on the main unit Package Contents■1 x Signal Jammer with 8 Antennas■1 x Power Adapter■1 x Car Charger■1 x User ManualProduct Reviews:1.No matter what other people to choose, I really like this one.2. Very good product. Everything works well! Good!3. Very good product,fast shipping and high quality.4. wow,it's very interesting. looks good, useful gadget.5. a new place for my digital life, will be a long term customers here6. Great tool! No issues at all.7. It's a powerful device. It's wonderful, works so well. Now, it's a necessity of our work. Very good!8. Good quality. GSM jamming is perfect.