It is well known that library is a peaceful place with an atmosphere that full of strong humanities flavor, a place with people in it, warmth and comfort. A good library is a combination institution of gathering, arrangement and collection of books and reference materials that for people to read and consult. As early as 3000 BC appeared the oldest library appeared in the world, library has the functions of preserving human cultural heritage, developing information resources and participating in social education and so on. And the top ten libraries in the world are Library of Congress, United States, Russia State Library, National Library of China, British Library, Bibliothèque nationale de France, BnF and so on.
Sometimes we like to go to the library with our friends for some reading. Some people just come for a cool spot in a hot summer or warm spot for a cold winter. Absolutely, lots of people come here for study. Because library is a place where knowledge in more abundant than ever. So it is the top priority to keep the silence in such a place.
But there are always rude users of cell phone, they interrupt this quiet and never shame of their behavior. Do not be upset, a cell phone jammer can do you a big favor. With a cell phone jammer it can block all the cell phone signals around you. Now, you can read your book without any disturbance.