Is there another thing that could affect our lives like mobile phones? The answer is NO. The mobile phone was invented to help us to make callings at first, but as its functions going stronger and stronger, it becomes a necessary part for us. It beccomes our family, our best friend. When we go out, we may forget everything, except for the mobile phone. If our mobiles phone are not with us, even for ten minutes, we will feel uncomfortable, we will feel unsafe, we will feel unhappy. But the abuse of mobile phones also cause trouble to us, especially in some places that absolute silence is needed. In those kind of places, ring of mobile phones will cause trouble. For example, in a church, in a concert stage, in a library, in a movie center, gas station and others. Now what can we do for that? Is there a way that we could disable all mobile phones in a certain place? Yes, we developed mobile phone jammer for that kind of purpose. Mobile phone jammer is a kind of electronic device that could create a stronger signal to cover and hide mobile phone signal, thus disable all mobile phones in a certain range. But once we turn the mobile phone jammer off, all mobile phones will come back working in a minute, it will not do any harm to the mobile phones. Now you see that we need to know more about the mobile phone jammer. Let's take a look at a good mobile phone jammer, the 40 Meters Shielding Radius Mobile Phone Jammer with Remote Controller. This mobile phone jammer is a powerful cell phone signal shield. It disables nearly all kinds of cell phone signals. If you really don't want to be interrupted by personal calls at important meeting or something else, then you'll require this useful item – mobile phone blocker.

Effective shielding radius: 10-40m (Depending on the strength signal in given area)
No harm to human being, eco-friendly
With omni-directional antennas
Easy to install and operate

Technical Specification
Cover interface standards: Digital: IDEN, TDMA, CDMA, GSM and UMTS
Total output power: 11W (CDMA800:3W, GSM900:3W, 1805-1990: 2.5W, 2100-2200: 2.5W)
Antennas External Omni directional
Every band frequency can select output power
All the TX frequency covered down link only
Automatic power switching power supply: 50 / 60 Hz / AC 100 ~ 240V
Shielding Range:
-CDMA800: 850-894MHz;33dBm; 6dBm/30KHz (min)
-GSM900: 920-960MHz; 33dBm; 5dBm/30KHz (min)
-DCS1800: 1805-1880MHz; 33dBm; 2dBm/30KHz (min)
-PHS 1900: 1895-1920MHz; 33dBm; 2dBm/30KHz (min)
-GSM1900: 1930-1990MHz; 33dBm; 2dBm/30KHz (min)
-3G: 2110-2170MHz; 33dBm; 2dBm/30KHz (min)
Power supply: AC adapter (AC220V-DC5V)
Shielding Radius: 10-40 meters (Depending on the strength signal in given area)
-75dBm Rules of installation: UL (E190582) CSA (LR 112971 Level 3)
Weight: 2.8KG/PCS
Remote control: Can open and close the Jammer
Dimension: 210*50*170mm

It is a very strong mobile phone signal jammer, it could jam almost all mobile phone frequencies. And it has cooling fan, could make it work very long time. Also, it has a very special design, remote control, you could turn it on or turn it off in a far way. This is a very useful mobile phone jammer, could meet most of your request. If you want to know more about mobile phone jammer, please come to our website, there are hundred of jammers here. Besides of mobile phone jammers, we also have GPS jammer, wifi jammer, 4G jammer, high power jammer, UHF/VHF jammers and so on.