A friend of mine's library manager once told me that his library was very quiet in the past, and readers and friends could read all kinds of books quietly without being disturbed by refurbishment. But since a group of young people came, the situation has changed: this group of people often calls inside, even noisy, when I see him he bought a cell phone jammer.
The library has remained quiet since the friend ’s library used a signal disruptor, and his readers and friends can enjoy a quiet reading atmosphere again. mobile phone blocker is a signal disrupt device used to block mobile phones in a certain area. After the interference device is turned on, the mobile phones in the area cannot send or receive any signals from the base station.
