Buying a set of hearing aids used to involve an appointment to see an audiologist, some testing, and a fitting. The new way to buy hearing aids is to head to your local retail store, select the ones you want, and buy them on the spot. A new set of FDA regulations allowing for over-the-counter, self-fitting hearing aids has resulted in several new lower cost models quickly making their way to market. The Eargo 5 and 6 are not the first from the company to qualify for self-fitting, but they are the first to launch as over- the-counter models. When worn, they run on batteries that are good for 16 hours.