OMNIFIT BRAIN OCW-H20 User Manual page 2

LED Indicator
Charging Port
3. Charging
Right
① For charging, do connect USB cable to right under USB charging port
② When the charger is connected, the Bluetooth pairing will be disconnected.
③ While charging, the LED indicator will show a solid red light.
*Charging Status LED Indicator
Full charged (Green)
Charging (Red)