Behind-the-ear (BTE) hearing aids fit behind the ear and are attached to a custom-made earpiece. They can address a wide range of hearing losses and may include direct audio input and telephone capabilities. ReSound hearing aids feature iSolate nanotech, which coats internal and external components with a protective molecular layer to shield them from moisture without affecting performance. This allows liquids and moisture to roll off without being absorbed for industry-leading protection inside and out.