3G 4G Cell Phone Jammer GPS Jammer Wifi Jammer Lojack Jammer with 8 BandsFeatures ■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.It\'s a powerful device. It\'s wonderful, works so well. Now, it\'s a necessity of our work. Very good!2. wonderful product. I used it for a long time,worked well and really reached the effect that I expect.3. Good quality,good and fast service ,good comunication.4. The service is excellent and they answered my question patiently, really satisfied!5. the jamming effect is really good and can has helped me a lot and always can work well!really great!6. It's a powerful device. It's wonderful, works so well. Now, it's a necessity of our work. Very good!7. Very good product. Everything works well! Good!8. Works great, really fast shipping !