When the battery level set by the user is reached, a charging notification song is played. Also It will be notified by music when the battery has a full charge. [main function] - Alarm song setting function (with ringtone) - Battery alarm level setting function (if set to 80%, alarm at 80%) - Battery temperature alarm (overload, etc.) - Volume control function. - Vibration function - Set the 'Do Not Disturb' time. - Voice notification function (TTS). - Battery status warning function - Batt