In Canada, less than 30% of the geography is covered by cellular systems. There are lots of human activities in these uncovered remote areas for either gaining nature resources or outdoor experience. In this scenario, the walkie talkie is the only and vital method helping people to build connection between each other, which can ensures their safety. Nevertheless, the signal of walkie talkie devices can be easily attenuated and/or blocked by complicated terrains such as the forest, large rock messes, and mountains.
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