Phonak Una User Manual page 37

Wind and Weather Protector
Important: The Wind and Weather Protector is an
exclusive Phonak system designed to protect Una's
high-tech microphones from dust and humidity.
As a result they last much longer, reducing the service
costs of your hearing aids. The life span of the
Wind and Weather Protector should be up to several
months, depending on the environment (wet, dusty,
perspiration etc.). The Wind and Weather Protector
should not be cleaned but replaced regularly. Your
hearing aids should never be used without the
Wind and Weather Protector.
37