The R4 is a rechargeable receiver-in-canal hearing aid that is easy to use and care for, even for elderly people. It uses wireless charging technology with a built-in rechargeable battery. Simply place it on the charger. The R4 has a seamless and gentle form. Here the concept is "relax." Remove the R4 from the charger and it is automatically powered on. All switches are moved to a remote and smartphone app. It is comfortable to wear placed securely behind the ear. Because the R4 doesn't have mechanical switches or a battery door, the case has been sealed allowing for higher reliability.