You can use the HHOGene app to check the battery level of the charging case or each earbud. To check the battery level using the app, first make sure that the app is active and that the charging case is turned on. When the charging case is not connected to the charger for charging. - Green indicates that the charging case has more than 60% battery remaining. - Orange indicates 21-60% battery remaining. - Red indicates that the battery is very low and should be charged as soon as possible