If the power is turned on and you can not hear the sound or stop working, check that the earphone plug is properly connected to the earphone jack of the product. If the earphone is properly connected to the product and you can not hear the sound even when the power / playback switch is blinking, use another earphone to determine whether the earphone is malfunctioning.
If the earphone is not connected normally, the power will be turned off automatically if it stops for 5 minutes. If you want to cancel the quiescence, please tighten the earphone plug correctly and press the power switch once.
"Brain On" is designed to be disabled during charging.