A great video below from Sascha 13HN2507 which I’ll allow him to explain in his words as always better than mine!

Hi Simon, the video is about the different radio applications in emergency situations.
The first two tests are out of my basement and the 2nd test is a range test at 5 and 10km distance of the 4 different radio applications.

All Rights Reserved (c) http://www.simonthewizard.com 2013-2022 Unauthorised Use / Or Duplication of this material without express and written permission from this blog’s author is strictly prohibited. Excerpts and links may be used, provided that full and clear credit is given to simonthewizard and http://www.simonthewizard.com with appropriate and specific direction to the original content.