In the face of unpredictable natural disasters, such as hurricanes, floods, volcanoes, earthquakes, mudslides, tsunamis, snowstorms, etc. . Communication and power systems are often catastrophically damaged. Mobile phone signals are often unavailable. But people need timely communication to reduce the threat to life safety as much as possible. Walkie-talkies, using natural radio signals, can communicate frequently under any conditions without mobile phone signals. The walkie-talkie plays an irreplaceable role in emergency rescue. An emergency radio is, broadly speaking, a radio receiver designed to remain functional, in cases of power outage or isolation from contact with civilization. Emergency radios are generally designed to cover the standard AM and FM broadcasting bands, and weather radio in countries that provide that service. Retevis …
