Users can use the app to set up the audio device's features, including volume level, noise reduction adjustments, Hertz settings, etc., as well as take a listening test to create a personal audio map, and the results of the listening test can be synchronized to the iPhone's Health, and the personal audio syntax can be applied to the EOs on the audio device, which are automatically adjusted according to the individual listening parameters and, thanks to the customization, the user can hear more detailed information. enable the user to hear more detailed information.