It means that cell phone jammer is valid in jamming cell phone signals

 The portable low power cell phone jammer is equipped with the built-in battery.
The mobile phone market is in full compliance with the 28 principles, 20% of mobile phone brands accounted for more than 80% of sales. Foreign brands NOKIA, MOTO, SonyErricsson, Samsung and other domestic brands, Lenovo, Bird, Amoi. Foreign brands with a view to leading-edge technology and reliable production process, excellent function, beautiful appearance of the product has been dominated by the lion's share of the high-end, second-tier market. Domestic brands rely on their IT or other electronic products, sales channels and low prices, to occupy the third and fourth tier markets and the vast rural market, but the last two years a large number of expansion one second-tier cities. Their relative influence can not be underestimated. This kind of portable cell phone jammer is independently researched and developed by the professional manufacturer. 
Phone interpreted as support a variety of multimedia carrier is a general trend. Population now has a camera phone, 300 000 pixels is the mainstream of current camera phones, and possession of up to 56.3%. The 100,000 pixel camera phone possession was significantly shrink only 7.4 percentage points. In addition, 35.4 percent of the consumer camera pixel mobile phone camera in one million or more, compared with the same period in 2004, increase about 27 percent. Thousand dollars or less, with the continuous listing of five million pixels or more pixel-level products, as well as megapixels camera phone prices fall into the domestic camera phones megapixels soon become the mainstream. cell phone jammer is suitable to the hidden and secret signal jamming in the small area.
At the same time, with the flash, screen rotation, continuous shooting, professional digital camera function for video playback and auto focus camera phone products account for a proportion of gradually rising, with the innovation of technological advances and applications, camera phones and professional digital cameras the function has been gradually approaching. The low-end digital cameras are bound to exist. Similar to the camera phone, music phone, game mobile phone and smart phone products feature upgrades is also very obvious. Not only have a marked improvement in the storage media and capacity, and also been a qualitative leap in functionality, enhancing the overall multimedia performance. Increasingly rich phone features, upgrade the product structure obviously the other side of the phone features and applications development is relatively slow. It means that cell phone jammer is valid in jamming cell phone signals. 
The current proportion of about 70%, mainly due to taking into account the current TDMA users may mostly be transferred to the GSM, GPRS, EDGE, WCDMA networks.