I read the article and it beautifully explained that it is a tool for people at public gatherings like festivals to easily be able to find each other. And to be

I read the article and it beautifully explained that it is a tool for people at public gatherings like festivals to easily be able to find each other. And to be able to alert friends to find one of one would feel uneasy in a situation. The direction of your paired friends is indicated by the max. Four lights at the outer ring. The compass tracks the direction you are going towards and this way, by aligning the "needle" with the target light it leads you to your friend.