To wake the the trackers up, simply double-tap them.
At this point, you should see the lights blink
A blinking light means that the trackers are trying to establish a connection with the FightCamp app.
They will stop looking for the FightCamp app after 15 seconds if they haven't found it
When the trackers are slowly flashing, it means that they are connected and ready to be used
Once connected, you can see your trackers connection status by looking at the trackers icon: