The frequency of devices we want to block with jammer
What a cell phone jammer does is basically block the frequencies your phone uses - 800MHz, 900MHz, 1800MHz, and 1900MHz in most cases, and it's important to find out what frequencies are used in your area. Each device supports different frequencies, you should buy the one that suits your needs
The most important feature of these devices is the frequencies it blocks - if you're tired of people chattering about their private problems in public, then buying these gadgets is the best solution - just turn on your jammer, When they lose contact with people on the web, you see their surprised expressions on the other end of the phone.
Signal jammers gps have been around for years, and today there are many companies producing these devices. A quick internet search will show you the best known brands and you'll see thousands of reviews for different models. This should make it easier to choose one of them. Don't forget, if you plan to use your device for a long time, you should look for jammers powered by at least a 2000mAh battery, as they can stay on for hours.
The thermal dissipation of a jamming device is the MOST important factor of all. The excessive amount of heat entails the malfunction of the scrambler itself.