A:Answer Hi Mario714, When you turn on the headset by pressing the POWER button, the indicator (red) flashes. You can check the remaining battery charge by the number of times the indicator (red) flashes. You can also check the remaining battery charge when the headset is turned on. Pressing the POWER button will cause the indicator to flash and show the remaining battery charge. (3 times: High, 2 times: Medium, 1 time: Low [needs to charge]) -Jerome