With the improvement of living standards, health issues become more and more important. In daily life, with the expansion and diversification of the use of radio waves such as smartphones, mobile phones, wireless LANs, wireless and IC tags, we are worried that radio waves may be harmful to our health, so we propose the safety of radio waves Questioned. There is one person. Machines such as cell phone jammer are widely used in many places.
In fact, it is not only suitable for university entrance examinations, but also for qualification examinations, high school entrance examinations, national examinations, etc. This means that cheating using mobile phones is discovered one after another. I think this method of installing a mobile phone jammer and temporarily "stopping service" the test site is the most effective measure. The installation of this equipment requires a radio station license. By transmitting weak radio waves at the same frequency as the radio waves notifying information from the mobile base station, communication is blocked, and subsequent location registration and polling become impossible, and therefore, the display of the mobile terminal becomes "out of service area" in". Communication is inhibited. We will also introduce this device around the bank. We will start to restrict the use of mobile phones in ATM corners. This is a joint effort by financial institutions to prevent criminal losses (such as transfer fraud). Multiple financial institutions will jointly install equipment in ATM corners. It is used as a measure to prevent transfer fraud.