Focus on what really matters Interton’s brand new Avio hearing systems get right to the heart of it: they enable hearing across the board. The three product families - Avio 1, Avio 3 and Avio 5 - address the many audiologic needs of both simple and complex listening situations. From basic to comfort to premium class, each family adds an extra layer of features and fine-tuning options for you. You can read more detailed information about each Avio family on the specific pages: Avio 1, Avio 3 and Avio 5.