They are having the different functions and features and they are also having the different prices. When you can spend much more money, you can choose a hand-held one, for it is a portable, and you can carry it anywhere conveniently, very suitable for you. In fact, it is this capability that makes the GPS such a useful device in the first place. A cell phone blocker will not just block the gsm and other network signals but also the internet usage and Bluetooth connections.
There are many types of the cell phone jammers in the market for us to get one for our usages such as the portable GPS phone jammers, the hand-held phone jammers, the radar phone jammers, the mini portable cell phone jammers and so on.
A cellphone jammer has now become a necessity to make a society cultured. There are places like hospitals and movie theatres that need silence. Surely, there are also some good cell phone jammers very cheap for the users. The first use of the cell phone jammers was done by the military forces in order to disrupt the calls between terrorists and other criminals. GPS devices transmit a signal out to the satellites that make up the global position system.
Now, many people have begun to focus their privacy concerns towards the growing consumer GPS industry. To maintain the decorum of these places, the institutions are installing phone jammers. While it is highly unlike that you will be tracked without your knowledge, it could happen, provided the tracker was equipped with some very high level technology. You can go to buy anyone of them due to your needs and the price of products. The size of these jammers can vary from a portable pocket sized one to a bigger one used to jam a bigger area.