How to confirm the use range of walkie-talkie
The propagation of radio is likely to be blocked by obstacles. In the mountains and forests, obstacles such as trees will reduce the range of the radio, and obstacles such as mountains may completely block the transmission of the radio. Therefore, in these areas, radio transmission will be restricted. In more urban areas, buildings will also severely block the propagation of radio. Most of the concrete reinforced bricks will reflect all radio waves. Therefore, when using a walkie-talkie in a city, the range you receive is less than the expected range.