A cell phone jammer is an instrument that prevents transmission or reception of signals; hence the jammer successfully disables cellular phones. They are not always beneficial, sometimes they are malicious. Situations such as hostage, bomb threats and when military action is underway, cell phone jammer can be employed by police or military to limit or disturb the communications.

 Wifi Jammer

Cell phone jammers in most countries used to be mainly used in military or police activities and work on a much larger scale. Now, with the invention of cell phone jammers for sale, smaller scale versions can be bought in some countries, to be used by the general public.

 

Cell phones jammers come in different sizes and ranges depending upon the utility. A small or a medium cell phone jammer can be bought for household purposes. A medium sized Cell phones jammer is very useful for small business concern or a large house or mansion.