audio service smart key Phonak Roger Filters are 100% acoustically tested

Filters are 100% acoustically tested and passive (no electronics

Consequently

six more hours of battery life are available after a short charge time of just 30 minutes

These problems may void the warranty

audio service smart key Phonak Roger Filters are 100% acoustically testedAudio Service Smart Key remote control The small remote control for Hearing Aids from Audio Service for the pocket or keychain. Smart Key works with high frequency sounds and addresses the Hearing Aids acoustically. Therefore, it can be used with very many Hearing Aids from the Audio Service range. The following features are available: Turning the Hearing Aids on and off Adjust volume Change hearing program So you have access to the functions of your