Created by advanced technology, this cell phone signal jammer stops the cell phone signals around completely. With this cell phone signal jammer, you won’t be disturbed by pesky phone signals. Especially when you are in the fields where phone using would lead to some explosions such as oil station, gas filled station, oil depot and so on. This cell phone signal jammer also can be perfect for all those areas that require quietness and seriousness including meeting rooms, museums, theaters, churches, classrooms etc. Besides, made of high quality materials, we guarantee you the best quality of this cell phone signal jammer. This device is designed to be placed either on a table top or inconspicuously on ceilings. Order one today and get yourself surprised! Working area: Oil station, gas filled station, oil field, oil depot, etc Specifications: Isolating signal bandwidth: 3g: 2110-2170mhz Gsm: 925-960mhz Cdma: 869-894mhz Dcs: 1805-1880m Output power: +35dbm/800mw Power input: ac110v-240vpower output: dc 5v 8a Jamming range: 15 to 20 meters (depends on the signal strength in given area) Power: ac adapter Working temperature: -10 to –55?i> Relative humidity: =90%(rh) Dimension: 320 x 270 x 110mm Weight: 10kg Accessories: Power adaptor Antennas User manual