Can come as ether wireless or telecoil/t-switch.
Completely-in-Canal (CIC) hearing aids are designed and sculptured to fit almost entirely inside your ear canal (external auditory meatus) and are therefore almost invisible, with only the faceplate and battery drawer usually visible.
There is only a small plastic tip “handle” on the Completely-in-Canal (CIC) device which shows outside the canal, this is used to help you insert and remove the hearing aid.
Before Invisible-in-Canal (IIC) hearing aids, completely-in-canal (CIC) hearings were the smallest custom hearing aids available.