The LED light embedded in the modules would indicate multiple informations:
While using
The LED light could indicate our devices’ battery level:

  • Green (every 10 seconds) - 100% - 21%
  • Red (every 10 seconds) - 20% - 0%
Light alarm
* You could also assign a color to identify your Tracker, when you have more than one Trackers, by going to Menu ▶ Devices ▶ Tracker ▶ choose light color. The light would come on when you press the grey button on the controller.
While Charging
  • blue - Charging
  • Green - Fully charged