BTE: Behind-The-Ear (BTE) hearing aids have the most circuit options and typically have more power than any of the custom made in-the-ear aids. BTEs "sit" on the back of your ear. They are connected to custom-made earmolds. These aids can now be fitted with an invisible slim tube instead of the plastic tubing.

Open BTE: Open Behind-The-Ear (BTE) hearing aids use tiny casing and a nearly invisible slim tube. Open fittings offer a cosmetically apppealing option. They are lightweight and tiny, with a transparent dome that makes them less noticeable than aids with custom earmolds.

ITE: In-The-Ear hearing aids are more visible and the easiest to handle of the custom made aids. They have a longer battery life than completely-in-the-canal aids.

ITC: In-The-Canal hearing aids are slightly less visible than ITEs. They require good dexterity to control the volume wheels and other controls on the faceplate.

CIC: Cmpletely-In-the-Canal hearing aids are one of the more cosmetically appealing custom made aids. They usually require a "removal string" due to their small size and their deep fit into the ear canal. CICs do  not usually have manual controls because they are too small.