1) Turning on or off
Three green lights flash when you press the on button. Three red lights flash when you turn the wristband off.
2) Microphone sensitivity level
When you touch the plus or minus buttons on the wristband, one light means the wristband is on low sensitivity, two lights mean the wristband is on medium, three lights mean the wristband is on high sensitivity.
3) Battery level low warning and battery charging
If your wristband is very low on battery, it is a single red light to warn you that it is almost dead.
4) When your wristband dies and if it has some power left, pressing the power button will cause a red light to flash 3 times.
5) When you plug your wristband in to charge, the lights indicate how full the battery is. When the battery is fully charged, it will show 3 green lights.
6) When you switch modes, your wristband confirms the change with a double flash of blue lights.