A:Answer Yes. Eargo Neo HiFi and Eargo Neo are two models that be adjusted and personalized for your unique hearing situation. First, you can download the Eargo app, connect by Bluetooth to your charger and make changes to the sound fidelity and listening programs. There are other functions within the app as well. You can also add and delete listening programs. For additional adjusting, Eargo’s team of licensed hearing professionals are able to personalize the hearing devices remotely through by sending changes to the app in your mobile device. They can customize the number, order, and type of programs and help mitigate an issue like feedback (or whistling), should it occur.