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.
Many educators struggle to figure out how to use electronic devices in the classroom. Some educate students about the negative effects and encourage them to regulate their use. Others even emphasized the possible uses of mobile devices in classrooms. However, many people just try to ban everything. A school principal in British Columbia raised the school’s ban to a new level by setting up cell phone jammers. There is only one problem-the device is illegal in Canada. The director ordered the Chinese device online, but some angry students quickly discovered it and told him it was illegal. This idea is very important. Now he looks bad