One of the most discussed topics on the Internet in the field of blocking devices is their scope of work. Each blocking device has a different blocking scope, and if you decide you need one of these devices, it's important to know about this topic. Anyway, I think you can find the information you have been looking for on the Internet.
gps jammer come in different qualities: battery life, supported frequencies, etc. Undoubtedly, the most important thing is the frequency supported by the device. Battery life is also an important feature and should be checked carefully if you intend to use the jammer for a long time. If you want to protect yourself from a GPS tracking device, choosing a GPS blocking device should be easy: all you have to do is know how often the tracking device is, and you will have all the necessary information to make the right choice.
As you know, you will not be able to buy one of these military frequency jammers because they are not for sale, but anyway, if you have the right budget, you may get a pretty good device that meets all requirements. Everything can be found on the internet. Speaking of the war on terror, we must mention that most countries have started to take these measures and have installed special obstacles on important roads passed by the president, so there is no danger of accidents.