Maintenance

OTICON WAX GUARD FILTER CHANGE
https://www.youtube.com/watch?v=HBqLzMMNAZE


SIGNIA 2.0 WAX GUARD FILTER CHANGE
https://www.youtube.com/watch?v=IX_hCxMHm
SIGNIA 3.0 WAX GUARD FILTER CHANGE
https://www.youtube.com/watch?v=tI5pJS9cNPg