Your hearing aid will need regular servicing generally every 6 months by your hearing care professional.
Phonak Audeo Belong B-312 (B50) Hearing Aid
The Audéo B family were created to simplify your life and make hearing effortless. Phonak says what makes Audéo B so special is its unique operating system called AutoSense OS. It senses your surroundings and adjusts your hearing aids every step of the way. All you have to do is turn them on, and the rest is automatic.