On Tuesday, January 21, 2020 at 1:49:36 PM UTC-5, wrote:
...What is the purpose of this thing?

If you are asking about FLARM, see:
http://www.nadler.com/GliderPilotUSA...FlarmHome.html

OGN lets everyone know where everyone is, great for friends, families, and sometimes SAR. In Europe, pretty much all gliders and many powered aircraft (majority of GA aircraft) have FLARM, and the distances aren't so big, so coverage is pretty good.

Hope that helps,
See ya, Dave