This device is used in conjunction with environment setting 4 on the Voicebud VB25 hearing aids to allow audio streaming or phone calls to be heard directly into the Voicebud VB25 hearing aids.

The device must be around your neck when in use and the Voicebuds must be set to environment setting 4.   

Please see VB25 manual for instructions on how to change your environment setting.

Keep in mind this will drain the battery faster when in use.