This is because the electromagnetic signal emitted by the isolator is completely in the range of the mobile phone frequency set by the state.It can only block off the communication of mobile phones.

 
  • 这是因为,手机安全信号屏蔽器发出的电磁信号完全落在国家规定的手机工作频带内,只会对手机通信产生阻断作用。
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