The In-the-Cortexi hear ing device is worn on the ear tunel. The face plate of unit fitted is not visible without looking directly in the ear. ITC over the counter hearing aids usually have a multi-tip fit system and even a flexible layer. ITC aids maybe difficult for the user alter and remove again whilst they may not small degree.
https://www.mid-day.com/brand-media/article/cortexi-review-buyer-beware-7-days-customers-examine-report-exposes-scam-23282679

https://sites.google.com/view/cortexi-dropsbuy/

https://medium.com/@hdsapuhva

https://www.youtube.com/watch?v=AD-5UW5yv_U