Bose SOUNDCONTROL Owner's Manual page 71

8
Troubleshooting
Eartip sizes
The eartip size is marked on the eartip packaging as size 1,
size 2, or size 3.
Size 2 open eartips come attached to the hearing aids.
Eartip size doesn't relate to cable length. You might
note
have a different eartip size and cable size for the same
hearing aid.
7 1